ISO 12643-3:2008

INTERNATIONAL ISO
STANDARD 12643-3
First edition
2008-03-01
Graphic technology — Safety
requirements for graphic technology
equipment and systems —
Part 3:
Binding and finishing equipment and
systems
Technologie graphique — Exigences de sécurité pour l'équipement et
les systèmes de technologie graphique —
Partie 3: Équipment et systèmes de reliure et de finissage

Reference number
©
ISO 2008
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©  ISO 2008
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ii © ISO 2008 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Effective date.5
5 Guarding of significant hazards.5
5.1 General.5
5.2 Safeguarding of crushing and shearing hazards .5
5.3 Interlocks .5
5.4 Guarding of hoppers and hopper feeders.6
5.5 Guarding on binding and finishing machines .7
5.6 Inserting and collating machines.21
5.7 Counter-stackers .21
5.8 Paper-embossing machines.22
5.9 Finishing machines .23
5.10 Guillotine cutters .29
5.11 Trimmers.38
5.12 Onserters/attaching machines .39
5.13 Overcover/protective wrapper gluers.39
5.14 Corner rounding machines.39
6 Information for use .40
6.1 Minimum requirements for machine markings.40
6.2 Contents of instruction handbook.40
Annex A (informative) Hazards associated with binding and finishing equipment and systems .44
Annex B (informative) Explosion-protection zones.50
Bibliography .52

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12643-3 was prepared by Technical Committee ISO/TC 130, Graphic technology.
This first edition, together with ISO 12643-1, cancels and replaces ISO 12649:2004.
ISO 12643 consists of the following parts, under the general title Graphic technology — Safety requirements
for graphic technology equipment and systems:
⎯ Part 1: General requirements
⎯ Part 2: Press equipment and systems
⎯ Part 3: Binding and finishing equipment and systems
The following parts are under preparation:
⎯ Part 4: Converting equipment and systems
⎯ Part 5: Stand-alone platen presses
iv © ISO 2008 – All rights reserved

Introduction
During the development of this part of ISO 12643, existing relevant standards of other countries were taken
into consideration. An effort has been made to harmonize the requirements of all countries, recognizing that
national standards or laws may dictate national requirements. In cases where it was known that there is a
national requirement that differs from this part of ISO 12643, that has been noted.
This part of ISO 12643 was developed to harmonize the following U.S. and European safety standards:
⎯ ANSI B65.2, Binding and finishing systems;
⎯ ANSI B65.3, Safety standard — Guillotine paper cutters, mill trimmers and integral handling equipment;
⎯ ANSI B65.4, Safety standard — Three-knife trimmers including rotary, and single- and multiple-knife
trimmers;
⎯ EN 1010-1, Safety of machinery — Safety requirements for the design and construction of printing and
paper converting machines — Part 1: Common requirements;
⎯ EN 1010-3, Safety of machinery — Safety requirements for the design and construction of printing and
paper converting machines — Part 3: Cutting machines;
⎯ EN 1010-4, Safety of machinery — Safety requirements for the design and construction of printing and
paper converting machines — Part 4: Bookbinding, paper converting and finishing machines.

INTERNATIONAL STANDARD ISO 12643-3:2008(E)

Graphic technology — Safety requirements for graphic
technology equipment and systems —
Part 3:
Binding and finishing equipment and systems
1 Scope
This part of ISO 12643 provides requirements specific to binding and finishing equipment and systems. It is
intended to be used in conjunction with the general requirements given in ISO 12643-1.
This part of ISO 12643 provides additional safety requirements for the design and construction of new
equipment used to convert printed or blank substrates into cut, folded, collated, assembled, bound, or
otherwise finished product. It can also be applicable to processes for preparing substrate for the printing
process.
It is applicable to a wide range of equipment used in the binding and finishing process.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 12643-1, Graphic technology — Safety requirements for graphic technology equipment and systems —
Part 1: General requirements
ISO 13732-1, Ergonomics of the thermal environment — Methods for the assessment of human responses to
contact with surfaces — Part 1: Hot surfaces
1)
ISO 13849-1:1999 , Safety of machinery — Safety-related parts of control systems — Part 1: General
principles for design
ISO 13852, Safety of machinery — Safety distances to prevent danger zones being reached by the upper
limbs
ISO 14119, Safety of machinery — Interlocking devices associated with guards — Principles for design and
selection
ISO 14120, Safety of machinery — Guards — General requirements for the design and construction of fixed
and movable guards
ISO 14123-1, Safety of machinery — Reduction of risks to health from hazardous substances emitted by
machinery — Part 1: Principles and specifications for machinery manufacturers
ISO 14123-2, Safety of machinery — Reduction of risks to health from hazardous substances emitted by
machinery — Part 2: Methodology leading to verification procedures
EN 1539, Dryers and ovens in which flammable substances are released — Safety requirements

1)
ISO 13849-1:1999 has been cancelled and replaced by ISO 13849-1:2006.
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12643-1, ISO 13849-1:1999 and the
following apply.
3.1
anti-repeat device
mechanical or electromechanical mechanism to ensure that only one cutting cycle occurs for each manual
activation or automatic cut if the primary stopping system or single-cycle device (3.32) fails
3.2
automatic cutting sequence
programmed succession of clamping operations and/or cutting movements that is initiated by the operator and
proceeds to a specified point without further intervention by the operator
3.3
back-rounding and pressing machine
apparatus for processing book signatures, i.e. for rounding the spine and the trimmed front edge of book
signatures and compressing the resulting signatures
3.4
backgauge
movable device (automatic or manual) on a guillotine cutter, positioned square to the cutting table, and which
is used to stop the stack of material to be cut when the material is pushed into the opening under the cutting
blade by the operator, and to determine the dimensions of the cut
3.5
backgauge drive
mechanism to position the backgauge (3.4) prior to the initiation of the cut
3.6
backlining and head banding machines
equipment for the automatic production of hard cover books where the binding together of the signatures is
rounded or flat, with glue, gauze, or paper
3.7
book cover crease forming machine
〈hard-cover bookbinding〉 apparatus for creating, under heat and pressure, a permanent bend in the cover of a
hard-cover book, then pressing the entire cover surface
3.8
book press
press used for flattening books after binding
3.9
book signature press
power-operated press used for flattening book signatures, which are fed and aligned manually
3.10
casing-in machine
〈hard-cover bookbinding〉 apparatus for gluing the end papers of the book signatures to the interior surfaces of
the book cover
3.11
clamp
device using pressure to secure product so that it does not move during an operation
2 © ISO 2008 – All rights reserved

3.12
clamp drive
mechanism by which the clamp(s) (3.11) of the paper cutter is/are forced against the material to be cut
3.13
coater
finishing machine that applies a predetermined thickness of a liquid substance (e.g. glue, varnish, ink) on
substrates made of paper or a similar material
3.14
counter-stacker
machine for stacking of piles of leaflets, books, magazines or newspapers such that the successive layers are
at 180°
3.15
cutting cycle
〈for machines with (a) manually driven clamp(s) (3.11)〉 programmed succession of operations that begins
when the knife drive is activated and ends when the knife returns to its retracted position
3.16
cutting cycle
〈for machines with (a) power-driven clamp(s) (3.11)〉 programmed succession of operations that begins when
high-pressure clamping is initiated and ends when the knife(s) and clamp(s) return to their retracted positions
after a single clamp/knife stroke
3.17
cutting zone
three-dimensional space through which any part of the knife(s) and/or clamp(s) (3.11) travel(s) during the
entire cutting cycle (3.16)
3.18
gang stitcher
machine for stitching folded sheets of paper, during the operation of which individual folded sheets are
removed by feeding grippers and the open sheets are stacked on top of each other on a transport chain for
subsequent back stitching
3.19
gathering machine
apparatus that assembles sheets or folded sheets in a binding line
3.20
guillotine cutter
power-driven machine having a single knife which is used primarily to cut paper products, stacks of paper, or
other substrates as specified by the manufacturer
NOTE This definition includes equipment classified as mill trimmers.
3.21
high-pressure clamping
operation of clamps (3.11) with a dynamic force in excess of 300 N for machines up to and including 1,6 m in
width, or 500 N for machines greater than 1,6 m in width, when measured at 75 % of the clamp opening (e.g.
with the clamp at 25 % of its maximum travel distance measured from the retracted position)
NOTE The 75 % value is to ensure the measurement is made at the position that approximates the size of an
operator's hand.
3.22
inserting machine
apparatus that inserts printed matter such as leaflets and magazines at a predetermined position in other
printed products, such as newspapers or magazines
3.23
knife drive
mechanism by which the knife of the guillotine is forced through the material to be cut
3.24
laminator
paper-finishing machine that applies a solid material (e.g. foil, paper) on a substrate made of paper or a
similar material
3.25
low-pressure clamping
〈for machines with (a) power-driven clamp(s) (3.11)〉 operation of clamps at a dynamic force not exceeding
300 N for machines up to and including 1,6 m in width, or 500 N force dynamic for machines greater than
1,6 m in width, when measured at 75 % of the clamp opening (with the clamp at 25 % of its maximum travel
measured from the retracted position)
NOTE The 75 % value is to ensure the measurement is made at the position that approximates the size of an
operator's hand.
3.26
manual clamping
operation of clamps (3.11) in which the dynamic and static forces and motion of the clamp are directly
supplied by the operator
3.27
paper drill
machine used to drill holes into piles of paper
3.28
paper-embossing machine
machine for finishing paper surfaces by using cylinders to press a design, etc., in relief into the paper
3.29
paper-finishing machine
apparatus used for applying liquid or solid coating material on a substrate made of paper or a similar material
3.30
perfect binder
machine for the automatic production of brochures (soft-cover) or book signatures (hard-cover) where
gathered folded sheets or single sheets are bound to form book or brochure signatures by applying glue on
the pre-processed book back, and where book or brochure signatures are inserted into covers by gluing the
cover on the back and/or sides
3.31
sheet-folding machine
apparatus to cut, perforate and/or crease single or multiple folds in single sheets of paper
3.32
single-cycle device
mechanism that ensures that only one cutting cycle occurs for each manual activation or automatic cut
NOTE See anti-repeat device (3.1).
3.33
stored energy
potential energy that may be released without actuation of the machine drive or controls
4 © ISO 2008 – All rights reserved

4 Effective date
This part of ISO 12643 applies to new machines manufactured after December 31 of the year following the
year of issue of this part of ISO 12643.
5 Guarding of significant hazards
5.1 General
Guarding, consistent with operation of the machine, shall be provided in those areas where it is recognized
that operators are exposed to significant hazards. The guarding requirements of ISO 12643-1 shall apply. See
Annex A for a list of hazards associated with binding and finishing equipment and systems.
5.2 Safeguarding of crushing and shearing hazards
Automatic travel of movable components shall not create any significant mechanical hazards.
This can be achieved, for example, by limiting the force of the component movement. The following guidelines
are suggested:
a) 50 N or less where the likely contact surface of the guard is a blunt edge or projection and there is no risk
of cutting or stabbing injuries; or
b) 150 N or less where the likely contact surface of the guard is a plane such that there is no risk of a
crushing injury.
Higher values can be chosen based upon risk analysis.
5.3 Interlocks
5.3.1 Exception for machine motion at inching speed
If a machine is operating at inching speed and under conditions defined in ISO 12643-1, motion may continue.
5.3.2 Exception for machine motion at production speed
This exception shall apply only to the specific machines identified in this part of ISO 12643, and does not
apply to all equipment.
NOTE This exception might not comply with current European standards or the Machinery Directive.
There may be parts of the equipment that cannot be observed or adjusted with the guard closed, and it may
be necessary for an authorized person to access this area with an interlocked guard open. Under these
circumstances, alternative safety measures shall be taken. All adjustments shall be made from outside the
hazardous area.
The following alternative safety measures shall be taken.
a) A mechanical key lock shall be provided adjacent to the access area. There shall be only one key for this
lock. The key for this lock shall be accessible only by an authorized person.
b) The key lock shall operate as a hold-to-run device as follows:
1) inserting the key shall initiate a timer that has a maximum setting of 2 min;
2) turning the key shall override the guard interlock of only that guard, up to the preset time limit;
3) as long as the key is held in the turned position, the guard may be opened with machine motion at
production speed until such time as the timer reaches the preset time limit;
4) when the key is released, it shall automatically return to the neutral position and the guard interlock
shall be automatically reactivated;
5) if the key remains in the lock for more than 2 min, the interlock on the guard shall be automatically
reactivated and the equipment safety system shall stop machine motion.
c) The bypassing means shall meet the requirements of category 3 of ISO 13849-1:1999.
d) When adjustments are necessary, they shall be performed from outside the hazardous area.
e) A warning label identifying the possible existing hazards with the guard open shall be provided adjacent
to the lock. The label shall clearly indicate that when the key is in the lock, the adjacent guard is
overridden.
If a machine is provided with this alternative safety measure, information regarding its safe use shall be
contained in the instruction handbook.
5.4 Guarding of hoppers and hopper feeders
5.4.1 Manually loaded hoppers
On machines using manually loaded hoppers, the hazard points on the separating elements of the hopper
feeder shall be safeguarded in accordance with 5.4.4. The exception defined in 5.3.2 may be applied to the
hopper feeder, if necessary.
5.4.2 Guarding of automatically fed hoppers
As an alternative to 5.4.1, on automatically fed hoppers where manual intervention during normal operation is
not required and the material used makes access difficult, tunnel-type guards arranged with a safety distance
of 550 mm from the nearest hazard point are considered adequate.
The exception defined in 5.3.2 may be applied to the hopper feeder, if necessary.
5.4.3 Protection of unused hoppers and hopper feeders
For hoppers that are not used and cannot be stopped, blanking boards shall be provided to safeguard the
hazard points at the separating elements.
5.4.4 Separating elements on hopper feeders
Separating elements on feeders shall be so designed that their movement does not create hazard points.
This safeguarding can be accomplished, for example, by maintaining a distance of at least 25 mm or a force
limit of 50 N between moving separating elements or between a moving element and a fixed object.
NOTE 1 Where blanks are fed from the bottom of a pile, safeguarding can be accomplished, for example, by
residual-pile monitoring of feeders, which complies with category B of ISO 13849-1:1999.
The hazard points on separating elements outside the sidelays on feeders shall be safeguarded for every
format size used. For hazard points within sidelays, residual-pile monitoring that complies with category B of
ISO 13849-1:1999 shall be used.
NOTE 2 This safeguarding can be achieved, for example, by using accordion-type bellows or additional guards.
6 © ISO 2008 – All rights reserved

5.5 Guarding on binding and finishing machines
5.5.1 Hand-fed riveting, eyeletting and attaching machines
Hazard points between tools on riveting, eyeleting and attaching machines either shall be prevented by design
or shall be safeguarded.
NOTE 1 This requirement is satisfied, for example, by
⎯ observing a maximum distance of 4 mm between the tools in the open position; or
⎯ ensuring that the closing force of the movable tool is less than 50 N; a stronger closing force is allowed to become
effective only after a sensing device has confirmed that no part of a human body is located between the two tools.
NOTE 2 The sensing device function, for example, can be based on the fact that the work piece and a body part have
different electrical resistances or different thicknesses.
Hazard points are safeguarded if guards are provided in accordance with ISO 13852, or the machine can be
started only by two-hand control.
For machines that are not guarded by a fixed or movable guard, a work-piece support shall be provided and
two-hand controls, in accordance with ISO 12643-1 shall be used. If the work piece needs to be held by hand
outside the hazard zone, a hold-to-run control shall be provided for starting the machine instead of the
two-hand control.
5.5.2 Hand-fed flat- and saddle-stitching machines
Adjustable guards shall be provided on flat-, saddle- and combined-stitching machines (see Figure 1 and
Figure 2) for operational reasons. Instructions that describe the safe adjustment of the guards in a clear and
easily understandable format shall be provided on the machine.
This marking requirement is satisfied, for example, by providing labels that illustrate the safety distances
required for the various stitching thicknesses by means of sketches and measurements.
On combination stitching machines in the saddle-stitching mode, the guard for the upper tool shall extend to
the height of the upper edge of the lower tool (upper edge of the saddle) and shall enclose the upper tool to
prevent inadvertent access (see Figure 2).
Guarding may be either by two separate guards or a combined reversible guard. Combined reversible guards
shall therefore be suitable for saddle stitching as well as for flat stitching.
5.5.3 Gang stitchers and drum stitchers
5.5.3.1 Feeders on gang stitchers and drum stitchers
Depending on the design, fixed guards, movable guards, residual pile monitoring or other means of guarding
may be used (see Figure 3).
Where the bottom of the feeder on the transport channel side needs to remain open for functional reasons
(see Figure 4), the lower edges of the guards on the transport channel side shall be extended as low as
technically feasible.
EXAMPLE An example of a functional reason would be for the use of air vortexes.
The exception defined in 5.3.2 may be applied to the feeder, if necessary.
Key
1 upper tool
2 guard
Figure 1 — Flat stitcher
Key
1 upper edge of saddle
2 guard
3 work piece
Figure 2 — Saddle stitcher
8 © ISO 2008 – All rights reserved

Key
1 transport chain
2 feeder
3 thickness control
4 stitching unit
5 trimmer
Figure 3 — Gang stitcher
Key
1 hopper
2 bottom of feeder
3 transport chain
Figure 4 — Feeder
5.5.3.2 Guarding stitching section of gang stitchers
Hazard points on the stitching section shall be safeguarded by interlocked guards on the operator’s side. The
other side shall be guarded in accordance with ISO 12643-1. Guard apertures shall be in accordance with
ISO 13852.
The transport pins shall be made of a flexible material to prevent a shearing hazard against the guard.
5.5.3.3 Caliper roll
Where an in-running nip exists on the caliper roll used for thickness control (see Figure 5), one of the following
means of protection shall be used:
⎯ maximum clamping force of 50 N with roller deflection at 20 mm; or
⎯ guarding in accordance with ISO 12643-1.

Key
1 folded sheets
2 in-running nip of calliper roll
3 transport chain
Figure 5 — Caliper roll for thickness control
Hazard points on the caliper section shall be safeguarded by interlocked guards on the operator’s side. The
other side shall be guarded in accordance with ISO 12643-1. Guard apertures shall be in accordance with
ISO 13852.
The transport pins shall be made of a flexible material to prevent a shearing hazard against the guard.
5.5.3.4 Transport-chain grippers on gang stitchers
A safety distance of at least 25 mm is required between transport-chain grippers and fixed machine parts.
5.5.3.5 Starting gang stitchers and drum stitchers with a guard open
Gang stitchers and drum stitchers may be started for make-ready by means of a two-hand control with
interlocking guards in the open position and at a speed greater than 10 m/min, provided that the requirements
of the exception in ISO 12643-1 are met.
5.5.3.6 Trimmer on gang stitchers and drum stitchers
The trimmer on gang stitchers and drum stitchers shall be safeguarded in accordance with 5.11.
5.5.4 Gathering machines
Gathering machines shall be guarded in accordance with 5.5.4.1 through 5.5.4.2. The exception defined in
5.3.2 may be applied, if necessary.
10 © ISO 2008 – All rights reserved

5.5.4.1 Guarding transport chains
For safeguarding the hazard points on the manual feeding unit, a minimum distance of 25 mm is required
between the transport chain and fixed machine parts. Where the minimum distance cannot be achieved and
maintained, trip bars meeting the requirements of ISO 12643-1 may be used for safeguarding. Hazard points
that can be reached from the manual feeding section in the following feeder shall be safeguarded by fixed or
interlocking tunnel-type guards having a minimum length of 300 mm (see Figure 6).
Hazard points on the gathering device (transport device) shall be safeguarded by fixed or interlocking guards.

Key
1 hopper
2 manual feeding
3 gathering device (transport device)
4 following machines
5 tunnel guard
Figure 6 — Gathering machine (plan view)
5.5.4.2 Starting gathering machines with a guard open
Gathering machines may be started for make-ready by means of a two-hand control with interlocking guards
in the open position and at a speed greater than 10 m/min, provided that the requirements of the exception in
ISO 12643-1 are met.
5.5.5 Perfect binders
5.5.5.1 Guarding book carriage hazards
The hazard points existing between book carriages and between the book carriage and the machine frame, as
well as during cover pressing, shall be guarded in accordance with ISO 12643-1. Depending upon the design,
fixed guards, movable guards or other means of guarding may be used (see Figure 7).
Key
1 milling unit 4 pressing unit
2 gluing unit 5 book carriages
3 cover feeder 6 delivery
Figure 7 — Perfect binder (plan view)
5.5.5.2 Hazards in the gluing unit
The hazard points existing in the gluing unit (glue rollers, glue applicators) and the hazard points that may
exist between materials and machine parts (book backs and clamps, book backs and glue rollers, etc.) shall
be guarded in accordance with ISO 12643-1. Depending upon the design, fixed guards, movable guards, or
other means of guarding may be used.
Guarding in accordance with ISO 12643-1 shall be provided to protect personnel from hot glue spray, both
during production and when routinely accessing other nearby areas. The guards adjacent to the hot glue
mechanism shall be interlocked so that the hot-glue spray mechanism is deactivated when the guard is open.
5.5.5.3 Glue pans
The glue pans for hotmelt shall be provided with a temperature control and maximum-temperature monitoring
in accordance with category 1 of ISO 13849-1:1999. Any hazardous hotmelt vapour shall be exhausted both
from the perfect binder and from outside the machine for pre-melters, unless protection from exposure to the
vapour is provided by other means.
Perfect binders using polyurethane hotmelt glues for binding shall be designed such that the machine does
not emit hazardous concentrations of isocyanates, or they are removed by an exhaust system. The
requirements of ISO 14123-1 and ISO 14123-2 shall be met.
Contact with hot surfaces of the hotmelt pan shall be prevented by guarding or by insulation.
5.5.5.4 UV radiation dryers
Where radiation UV dryers are used, the maximum values of emitted radiation shall comply with ISO 12643-1.
Where the machine operates with an automatic feed and routine and regular manual intervention is not
required, tunnel-type guards with a safety distance of 550 mm from the nearest hazard point are considered
adequate.
5.5.5.5 Delivery area
It shall be ensured that the book-carriage (clamp) hazards of the delivery of the perfect binder cannot be
accessed. The safety distance shall be a minimum of 550 mm.
12 © ISO 2008 – All rights reserved

5.5.5.6 Starting perfect binders with a guard open
Perfect binders may be started for make-ready by means of a two-hand control with interlocking guards in the
open position and at a speed greater than 10 m/min, provided the requirements of the exception in
ISO 12643-1 are met.
Where functional circumstances require the cover to be fed manually during set-up of the perfect binder, the
machine may be started when the interlocking guards are in the open position with a hold-to-run control and a
maximum speed of 10 m/min.
5.5.5.7 Milling head cutter (saw)
On high-speed binding lines, where inertia may prevent effective stopping of the milling head cutter when the
interlocking guard covering the book carriages (clamps) is opened, exposure to hazards caused by motion of
the saw shall be limited by preventing access to the hazardous area until motion has stopped.
5.5.5.8 Additional requirements for hand-fed perfect binders
Where there is a risk of injury if the operator's hand goes beyond the book clamp loading area, there shall be
a sensing device that will stop machine motion before injury occurs.
The cover-scoring blades shall be guarded with fixed or interlocking guards.
The milling-head cutter shall be protected against unintended access by the use of self-adjusting plates that
open to allow a book block to pass over the saw, then automatically close.
5.5.6 Paper drills
5.5.6.1 Single-head hand-fed paper drills
On single-head paper drills with manual feeding, the stroke of the drill or work piece shall be under hold-to-run
control (hand-controlled or foot-controlled) or hand-operated. In addition, a hold-down device (see Figure 8
and Figure 9) shall be provided on the drill in order to prevent persons from coming into unintentional contact
with the drill from the front. When the hold-to-run control is released, the drill or work piece shall retreat to its
start position.
The distance between the hold-down device and the chuck jaw shall be at least 25 mm (see Figure 8).
5.5.6.2 Guarding the trapping hazard on multi-head drilling machines
On multi-head drilling machines, the trapping hazard existing on drills and chuck jaws shall be safeguarded by
a fixed or interlocking guard (cover). On multi-drill machines, hazard points on the chuck jaws shall be
protected by the use of fixed or interlocking guards (see Figure 8 and Figure 9). The distance between the
hold-down device or guard (cover) and the chuck jaw shall be at least 25 mm.
Dimensions in millimetres
Key
1 chuck jaws
2 drill
3 hold-down device
4 material
Figure 8 — Paper drill
Key
1 chuck jaws
2 drill
3 hold-down device
4 material
5 guard (cover)
Figure 9 — Multi-head paper drill
14 © ISO 2008 – All rights reserved

5.5.7 Book-signature presses
On book signature presses, the hazard point between the moving pressing plate and the intermediate plate
positioned against the material supply shall be safeguarded by using a hold-to-run control (see Figure 10).

Key
1 book signatures
2 intermediate plate
3 pressing plate
Figure 10 — Book signature press
5.5.8 Book press
The hazard points between the movable pressing plate and the fixed pressing plate or the forming bar, if any,
shall be safeguarded. One means of safeguarding this area is by use of a trip device in accordance with
ISO 12643-1 (see Figure 11).
NOTE This device is used to press air out of the signature.

Key
1 trip device
2 movable pressing plate
3 fixed pressing plate
Figure 11 — Book press
On book presses where several pressing plates can be moved individually, the hazard points between the
movable pressing plates shall be safeguarded. One means of safeguarding this area is by fitting a guard
between the pressing plates (see Figure 12).
If the hazard is safeguarded by fitting a guard between the pressing plates, clearance between the guard and
moving pressing plates shall not exceed 6 mm (see Figure 12).

Key
1 trip device 3 fixed pressing plate
2 movable pressing plate 4 guard
Figure 12 — Book press with two movable pressing plates
5.5.9 Sheet-folding machines
5.5.9.1 Guarding hazard points at the folding rollers
The hazard points at the folding rollers shall be protected by fixed or interlocking guards. Adjustments should
be made from outside the guards. Safeguarding may also be accomplished by using a device with a guarding
function (see Figure 13).
NOTE An example of a safeguarding device is a buckle plate, as shown in Figure 13.

Key
1 unfolded sheet 3 buckle plate 5 cutting, creasing device 7 folded sheet
2 folding roller 4 sound enclosure 6 folding knife
Figure 13 — Sheet-folding machine
16 © ISO 2008 – All rights reserved

5.5.9.2 Hazard points on cutting, creasing and perforating devices
Hazard points on the cutting, creasing and perforating devices shall be guarded in accordance with
ISO 12643-1. Fixed guards, movable guards, or other means of guarding may be used, depending on the
design.
5.5.9.3 Safeguarding crushing points between folding knives and folding rollers
The crushing points between folding knives and folding rollers shall be guarded in accordance with
ISO 12643-1. Fixed guards, movable guards, or other means of guarding may be used, depending on the
design.
5.5.9.4 Safeguarding in-running nips on feeding and delivery belts
In-running nips on the feeding and delivery belts shall be guarded in accordance with ISO 12643-1. Fixed
guards, movable guards, or other means of guarding may be used, depending on the design (see
ISO 12643-1).
5.5.9.5 Machine motion with a guard open
When interlocked guards are in the open position, the machine may be operated by two-hand control at
production speed provided that the requirements of ISO 12643-1 are met, with the further exception that a
selector switch is not required.
NOTE The selector switch is not necessary because a sheet-folding machine is operated in a single mode by one
person.
5.5.10 Book-production lines for the production of hard-cover books
5.5.10.1 General
Book production lines may be started for make-ready with interlocking guards in the open position by means
of a two-hand control and at a speed no greater than 20 m/min, provided that the requirements of the
exception in ISO 12643-1 are met.
NOTE Hold-to-run control speeds in production lines differ due to cycle variations so that a continuous machine
speed can result in individual elements having higher speeds at the various stages of the process.
5.5.10.2 Safeguarding in-running nips on conveyor belts
The in-running nips on the belts of a feeding and delivery conveyor shall be guarded in accordance with
ISO 12643-1. Fixed guards, movable guards, or other means of guarding may be used, depending on the
design. Access from the conveyor belts to any hazard point in the machine shall be prevented (see
ISO 12643-1).
5.5.10.3 Safeguarding hazard points on preheater
The hazard points on the preheater device shall be guarded in accordance with ISO 12643-1. Fixed guards,
movable guards, or other means of guarding may be used, depending upon the design.
EXAMPLE Hazard points might be created by preheating rollers, hot parts and transport mechanisms.
Where the preheater is accessible, a pictogram warning of hot parts shall be posted in the vicinity of the
preheater.
With the guards in the open position, the preheater shall operate only under hold-to-run control that meets the
requirements of ISO 12643-1.
5.5.10.4 Safeguarding hazard points in glue sections
The hazard points in the glue sections shall be protected by fixed or interlocking guards. Safe glue
replenishment should be possible during the production run.
Where hotmelt is used, the hotmelt pans shall be provided with temperature control and limit temperature
monitoring.
EXAMPLE 1 Hazard points might exist, for example, at in-running nips between glue rollers and at in-running nips
between book signatures and glue rollers.
EXAMPLE 2 Safe glue replenishment might be provided, for example, by a piping system or by a method of
replenishment from outside the safety devices.
5.5.11 Back-rounding and pressing machines
5.5.11.1 Safeguarding in-running nips on feed and delivery belts
In-running nips on the feed and delivery belts shall be safeguarded (see ISO 12643-1). Access from the
conveyor belt to any hazard point inside the machine shall be prevented. A safety distance of 550 mm is
recommended.
5.5.11.2 Safeguarding hazard points on tipping section
Hazard points in the tipping section (see Figure 14) shall be protected by fixed or interlocking guards.

Key
1 feeding of book signatures
2 tipping of book signatures
3 pre-forming section
4 back-rounding and pressing section
5 delivery
Figure 14 — Back-rounding and pressing section (principle)
5.5.11.3 Safeguarding hazard points on pre-forming, back-rounding and pressing sections
Hazard points in the pre-forming, back-rounding and pressing sections (see Figure 14) shall be protected by
fixed or interlocking guards.
18 © ISO 2008 – All rights reserved

5.5.12 Backlining and head banding machines
5.5.12.1 Safeguarding in-running nips
Where book signatures are transported between vertically mounted conveyor belts, the in-running nip
between the two conveyor belts on the feeding side shall be safeguarded by a tunnel-type guard at least
550 mm long.
5.5.12.2 Safeguarding hazard points on glue section
In the glue section (see Figure 15), hazard points (e.g. glue rollers) shall be protected by guards.

Key
1 glue section
2 gauzing section
3 head-banding section
4 counter-pressure section
Figure 15 — Backlining and head banding machine (principle)
5.5.12.3 Safeguarding gauze section hazards
The cutting point at the gauze-cutting knife (see Figure 15) shall be protected by fixed guards. The in-running
nips on the rollers of the gauze section (unwinding) shall be safeguarded in accordance with ISO 12643-1.
5.5.12.4 Safeguarding head-banding section hazards
The hazard points inside the head-banding section (see Figure 15) and the cutting points at the cutting knives
and at the rotary knives on the unwinding unit of the head banding section shall be protected by fixed or
interlocking guards.
5.5.12.5 Safeguarding counter-pressure section hazards
The hazard points at the counter-pressure sections (see Figure 15) shall be protected by fixed or interlocking
guards.
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