ISO 12643-4:2010

INTERNATIONAL ISO
STANDARD 12643-4
First edition
2010-03-01
Graphic technology — Safety
requirements for graphic technology
equipment and systems —
Part 4:
Converting equipment and systems
Technologie graphique — Exigences de sécurité pour les systèmes et
l'équipement de technologie graphique —
Partie 4: Systèmes et équipement de façonnage

Reference number
©
ISO 2010
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©  ISO 2010
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ii © ISO 2010 – All rights reserved

Contents Page
Foreword .v
Introduction.vi
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Equipment covered by this part of ISO 12643.2
4.1 General .2
4.2 Machines used primarily in a converting operation .2
4.3 Machines used in both printing and converting processes .2
5 Machinery for the production of corrugated board .3
5.1 All machines .3
5.2 Unwinding stations .4
5.3 Splicers.6
5.4 Preheater .7
5.5 Single facer .9
5.6 Inclined belt conveyor.14
5.7 Bridge .14
5.8 Braking and web aligning section .15
5.9 Gluing machine.15
5.10 Heating and pulling section.16
5.11 Rotary shear unit .18
5.12 Pulling unit .18
5.13 Slitter-scorer units.19
5.14 Web diverter.20
5.15 Sheeters.20
5.16 Stacker devices .21
6 Folding box gluer machines.25
6.1 Entire machine.25
6.2 Feeder.25
6.3 Folding section .25
6.4 Gluing section.27
6.5 Folding belt .27
6.6 Pressing section.28
7 Pre-feeders.29
7.1 Pre-feeder with pile carrier plate.29
7.2 Pre-feeder with pile turner.30
8 In-line machines .32
8.1 Entire machine.32
8.2 Feeding unit .33
8.3 Printing unit .35
8.4 Slitter-scorer unit, rotary die-cutter.36
8.5 Folding unit (folding box gluer) .36
8.6 Taping unit .37
8.7 Stitching unit.37
9 Automatic flatbed die-cutting machines .38
9.1 Entire machine.38
9.2 Feeder.39
9.3 Punching section.39
9.4 Stripping section.40
9.5 Blank separating section, blank delivery .40
9.6 Trimming and delivery of gripper edge .40
10 Roller press die-cutters.40
11 Tube winding machines .40
11.1 Ply reels .40
11.2 In-running nips on shaft bearings.40
11.3 In-running nip between winding belt and winding material .40
11.4 In-running nips.42
11.5 In-running nips between glue rollers.42
11.6 Tube cutting and sawing section .42
11.7 Tube transfer.42
12 Machinery for the production of envelopes.42
12.1 Printing unit guarding .42
12.2 Longitudinal and cross-scoring section .43
12.3 Form cutting section .43
12.4 Driven guide rollers .43
12.5 Window cutting section .43
12.6 Window material conveying section with unwinding unit.43
12.7 Scraper gluing unit .44
12.8 Separating cutting section.44
12.9 Bottom flap folding section .44
12.10 Transport rolls.45
12.11 Staggering wheel .45
12.12 Roller gluing unit .45
12.13 Hot air dryers.47
12.14 Separation roller before aligner section.47
12.15 Aligner section.47
12.16 Seal flap folding section .47
12.17 Separating disc delivery .48
12.18 Starting the machine with interlocking guards open.48
13 Instruction handbook .48
13.1 Corrugated board machinery .48
13.2 Machines for the production of envelopes .49
Bibliography .51

iv © ISO 2010 – All rights reserved

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 12643-4 was prepared by Technical Committee ISO/TC 130, Graphic technology.
It is the intent of ISO/TC 130 that this first edition of ISO 12643-4 become applicable to new equipment
manufactured from 2011-01-01.
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: Prepress and press equipment and systems
⎯ Part 3: Binding and finishing equipment and systems
⎯ Part 4: Converting equipment and systems
⎯ Part 5: Stand-alone platen presses

Introduction
The purpose of this part of ISO 12643 is to reduce the risk of injury to operating personnel working on
converting equipment.
This part of ISO 12643 provides requirements for the design and construction of converting equipment used in
the package printing, converting and graphic technology industries. It covers equipment not addressed by the
other parts of ISO 12643. It is intended to be used in conjunction with ISO 12643-1 and provides additional
requirements that are specific to converting equipment.
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 take into consideration the requirements of many countries,
recognizing that national standards or laws may dictate national requirements. Cases where a national
requirement was known to differ from this part of ISO 12643 have been noted.
This part of ISO 12643 was developed to harmonize the following US and European safety standards:
ANSI/PMMI B155.1, Safety Requirements for Packaging Machinery and Packaging-Related Converting
Machinery
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
EN 1010-5, Safety of machinery — Safety requirements for the design and construction of printing and paper
converting machines — Part 5: Machines for the production of corrugated board and machines for the
conversion of flat and corrugated board
vi © ISO 2010 – All rights reserved

INTERNATIONAL STANDARD ISO 12643-4:2010(E)

Graphic technology — Safety requirements for graphic
technology equipment and systems —
Part 4:
Converting equipment and systems
1 Scope
This part of ISO 12643 provides safety requirements for the design and construction of converting equipment
used in the package printing, converting and graphic technology industries. It is applicable to converting
equipment not covered by other parts of ISO 12643. It is intended to be used in conjunction with the general
requirements given in ISO 12643-1.
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
ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for
design
ISO 13850, Safety of machinery — Emergency stop — Principles for design
ISO 13855, Safety of machinery — Positioning of protective equipment with respect to the approach speeds of
parts of the human body
ISO 13857, Safety of machinery — Safety distances to prevent hazard zones being reached by upper and
lower limbs
ISO 14119, Safety of machinery — Interlocking devices associated with guards — Principles for design and
selection
ISO 14122-3, Safety of machinery — Permanent means of access to machinery — Part 3: Stairs, stepladders
and guard-rails
IEC 60529, Degrees of protection provided by enclosures (IP code)
IEC 62061, Safety of machinery — Functional safety of safety-related electrical, electronic and programmable
electronic control systems
EN 619, Continuous handling equipment and systems — Safety and EMC requirements for equipment for
mechanical handling of unit loads
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 12643-1 apply.
4 Equipment covered by this part of ISO 12643
4.1 General
This part of ISO 12643 covers a variety of equipment used in printing plants and converting operations. Those
used primarily in a converting operation are listed in 4.2, while those that may be used in a printing operation
covered in other parts of ISO 12643 are listed in 4.3.
4.2 Machines used primarily in a converting operation
Machines used primarily in a converting operation include the following:
⎯ machinery for the production of envelopes;
⎯ machinery for the production of corrugated board;
⎯ folding-box gluer machines;
⎯ in-line machines;
⎯ automatic flatbed punching machines;
⎯ tube-winding machines;
⎯ box-making machines;
⎯ finishing/window equipment;
⎯ hole punching machines;
⎯ laminating machines/laminators;
⎯ pre-feeding/stack-turning machines.
4.3 Machines used in both printing and converting processes
Machines used in both printing and converting processes include the following:
⎯ label printing machines (see also ISO 12643-1 and ISO 12643-2);
⎯ coating machines (see also ISO 12643-3);
⎯ curing and drying machines (see also ISO 12643-2);
⎯ cutters, creasers and die-cutters (see also ISO 12643-3);
⎯ rewinding/roll equipment/slitting and rewinding equipment (see also ISO 12643-1);
⎯ embossing equipment (see also ISO 12643-2 and ISO 12643-5);
⎯ tension control equipment (see also ISO 12643-1).
2 © ISO 2010 – All rights reserved

5 Machinery for the production of corrugated board
5.1 All machines
5.1.1 General
An example of a corrugating machine is shown in Figure 1.

Key
1 unwind 6 heating section 11 web diverter
2 single facer 7 pulling section 12 sheeter
3 bridge 8 rotary shears 13 upstacker
4 preheater 9 pulling unit 14 downstacker
5 gluing machine 10 slitter-scorer unit
Figure 1 — Principle of a machine for the production of corrugated board
5.1.2 Emergency stop
Emergency stop devices shall be provided on each motion control station. Emergency stop devices shall be
no more than 15 m apart.
Emergency stop devices shall stop the motion of the entire machine.
EXCEPTION — The glue rollers of the gluing unit may continue running if the danger points on the
gluing unit are safeguarded by guards.
5.1.3 Zone control with stop/safe devices
Where stop/safe devices are provided, the following requirements apply:
⎯ stop/safe actuators shall be marked such that they clearly indicate the section to which they apply;
⎯ signal processing shall comply with PL d of ISO 13849-1 or SIL 2 of IEC 62061.
r
Where the machine is configured into control zones, they shall be as follows (see Figure 2):
a) one control zone for each single-facer group (unwind of liner with preheater, single facer, unwind of
corrugated web);
b) one control zone for the liner unwind before heating up to stacker device.
One or more stop/safe devices shall be provided in each control zone.

Key
1 first control zone for first single-facer group
2 second control zone for second single-facer group
3 third control zone for liner unwind up to stacker device
Figure 2 — Control zones
5.1.4 Access stairs and walkways
Access stairs and walkways shall comply with ISO 12643-1.
5.1.5 Steam pipes
Steam pipes that can be accessed from any working level shall be insulated up to a height of 2,70 m from the
working level for protection against burning.
5.1.6 Guarding access points between system components
Accessible areas between system components shall be guarded by means of fixed or interlocking guards in
accordance with ISO 12643-1 if a hazard point can be reached, e.g. the area between a gluing machine and a
heating and pulling section.
5.1.7 Audible start-up warning
Corrugating machines shall have an audible warning system that complies with ISO 12643-1.
5.2 Unwinding stations
5.2.1 General
Means shall be provided to ensure that reel cores, which might be stuck to a reel cone, can be safely
removed, e.g. using an automatic reel core ejector that pushes the core away from the cone.
4 © ISO 2010 – All rights reserved

5.2.2 Safeguarding automatic reel loading
The area where automatic reel loading takes place shall be safeguarded in accordance with ISO 12643-1.
See Figure 3 for an illustration of the positioning of electro-sensitive protective devices (ESPDs) for this
equipment in аccordance with the requirements of ISO 12643-1.
Dimensions in millimetres
Key
1 ESPD
2 photoelectric beam of the ESPD
3 additional ESPD
4 material reel
Figure 3 — Unwinding station, automatic reel loading
5.2.3 Chucking cones and lifting arms
The hold-to-run speeds for inserting the chucking cones and moving the lifting arms may be increased to
15 m/min maximum if the hold-to-run buttons are located at a minimum distance of 850 mm from the lifting
arms.
5.2.4 Braking systems
The blowers for the braking systems on unwinding stations shall have at least the degree of protection IP 23,
as specified in IEC 60529. Accumulation of inflammable dust in the brakes shall be prevented.
NOTE The accumulation of inflammable dust in the brakes can be reduced if the louvres provided in the ventilator
housing open to the bottom while the lifting arms are in operating position.
5.3 Splicers
5.3.1 Guarding hazard points
On splicers, any hazard points between the dancer roller carriage and guide rollers, and between the dancer
roller and fixed parts of the machine shall be avoided by design measures or be safeguarded (see Figure 4).
If safeguarding by distance, the following requirements apply:
⎯ a minimum distance of 25 mm if the hazard points are at a height greater than 2,20 m;
⎯ a minimum distance of 120 mm if the hazard points are at a height less than or equal to 2,20 m.
Safeguarding may also be achieved by the use of guards in accordance with ISO 12643-1 or safety devices
with approach reaction (e.g. trip devices, pressure-sensitive mats, electro-sensitive devices).
5.3.2 Dancer roller
The movement of the dancer roller into position for web threading shall be safeguarded.
Where hold-to-run control is used for safeguarding, the hold-to-run speed shall not exceed 15 m/min.
The in-running nips on the dancer roll carriage wheels shall be safeguarded by fixed guards that meet the
requirements of ISO 12643-1.
Key
1 paper web
2 guide rollers
3 dancer roller
4 gluing unit
Figure 4 — Splicer
6 © ISO 2010 – All rights reserved

5.3.3 Splicers
On splicers, hazard points between the movable suction bar and fixed machine parts shall be prevented by
safety measures or be safeguarded (see Figure 4). Safeguarding can be achieved by one or more of the
following measures:
⎯ providing a minimum distance of 25 mm for danger points above 2,20 m and of 120 mm for heights less
than or equal to 2,20 m;
⎯ a hold-to-run control meeting the requirements of ISO 12643-1, if it is possible to observe the hazard
points and hazard zones form the point of operation of the hold-to-run control;
⎯ limiting the force of the movable glue bar to 300 N and the travel speed of the carriage to 15 m/min.
The control panel for operating the glue bar shall be provided with an emergency stop button.
5.3.4 Knife
The cutting edge of the knife shall be safeguarded in the rest position.
5.3.5 Pneumatic and hydraulic control systems
Where pneumatic or hydraulic control systems are used for starting the cutting cycle, a safety-rated check
valve shall be supplied to ensure that the knife remains in the safe position in case of leakage or hose
breakage.
5.3.6 Frame edges
Where the machine frame of the splicer is lower than 2 m at the sides (as measured from the floor), frame
edges shall be provided with black-yellow padding for protection against impacts.
5.3.7 Splicers in elevated positions
If preparation of the movable suction bar cannot be accomplished from floor level, safe access shall be
provided.
5.3.8 Warning lights
A red warning light shall flash for 2 s prior to the initiation of the automatic splicing operation and during the
entire period of automatic motion. The integration of the status lights into the control system may be
single-channel, e.g. via an electronic control system.
5.4 Preheater
5.4.1 In-running nips
The in-running nips between the wrap roller and the preheating cylinder, and between the wrap roller and
fixed machine parts or guide rollers (see Figure 5), shall be safeguarded by one or more of the following
measures:
⎯ using the minimum distance of 120 mm;
⎯ guarding in accordance with ISO 12643-1.
Key
1 preheating cylinder
2 paper web
3 wrap roller
4 guide roller
Figure 5 — Preheater, side view
5.4.2 In-running nips between preheating cylinder and cross beams
The in-running nips between the preheating cylinder and any cross beam shall be safeguarded by maintaining
a minimum distance of 300 mm.
5.4.3 Wrap roller and wrap arms
The drives for the wrap roller shall be safeguarded by fixed guards completely enclosing the drives.
Rotating wrap arms (see Figure 6, item 2) shall be designed such that any openings in the wrap arms do not
create a shearing hazard.
The distance (see Figure 6, d) between the preheating cylinder and the rotating arm shall be 6 mm or less or
30 mm or more.
The hazard point between the rotating arms and the machine side frame shall be safeguarded (see Figure 6,
items 2 and 4) by one or both of the following measures:
⎯ a hold-to-run control of at least PL c of ISO 13849-1 or SIL 1 of IEC 62061 as specified in ISO 13849-1;
r
⎯ a minimum distance of 120 mm and designing the rotating arm or machine side in such a way that parts
of the body are deflected by the arm when rotating at its maximum circumferential speed of 5 m/min.
8 © ISO 2010 – All rights reserved

Key
1 wrap roller
2 rotating arm
3 preheating cylinder
4 machine frame
d distance between preheating cylinder and rotating arm
Figure 6 — Preheater, feeding side
5.4.4 Hot surfaces
As the temperature of preheating cylinders may be higher than 65 °C, warning signs indicating the hot
surfaces shall be fitted to both sides of the preheater. Operators working near the preheater shall wear
appropriate personal protection equipment to protect against burns.
5.4.5 Walkways
If walkways with fall-off protection are located near preheaters, the distance between the fall-off protection and
movable parts of the preheater shall be at least 120 mm.
For fall-off protection and walkways, see ISO 12643-1.
5.5 Single facer
5.5.1 In-running nips
On single facers where the web is fed through a webbing slot, if it is impossible to apply the safety distances
specified in ISO 13857 (as required by ISO 12643-1), a safety distance of 300 mm shall be observed for gaps
with a width of more than 20 mm and less than or equal to 40 mm.
The in-running nips between the corrugating rollers and fixed machine parts shall be safeguarded by fixed
guards. The hazard point between the corrugating roller and the cross beam with scrapers is considered to be
safeguarded if the clearance between the corrugating roller and the cross beam is at least 25 mm and the
clearance between the scrapers is no more than 60 mm (see Figure 7).
Dimensions in millimetres
Key
1 upper corrugating roller
2 lower corrugating roller
3 scraper
4 cross beam
5 feeding of paper web
Figure 7 — Corrugating rollers with scraper (front and side views)

5.5.2 Corrugating rollers
Where corrugating rollers are removed for changing, means of transport shall be provided that allow easy and
safe changing of rollers.
When noise enclosures are used, they shall be designed in such a way that loading and unloading of the
corrugating rollers is not impeded.
5.5.3 Hazard points during roller change
Any hazard points that can be accessed after removal of, or during changing of, corrugating rollers shall be
safeguarded in accordance with ISO 12643-1.
Where corrugating rollers are mounted on an indexing turret, any movement of the turret shall be under
hold-to-run control with displacement limited to a maximum of 75 mm or with a maximum operating speed of
5 m/min.
10 © ISO 2010 – All rights reserved

5.5.4 In-running nip between pressure roller or pressing belt and corrugating roller
The in-running nip between the pressure roller or pressing belt and the corrugating roller (see Figure 8) shall
be safeguarded by fixed guards.
The crushing point created by the lowering of the pressure roller contacting the corrugating roller shall be
safeguarded by a guard in accordance with ISO 12643-1 or by using a horizontal safety distance of 1 000 mm
from the hazard point (see Figure 8).
In-running nips on the pressing belt shall be safeguarded by fixed guards.
5.5.5 Belt breakage
On the delivery side of the single-faced corrugated web (inclined belt conveyor side), a containment device
shall be provided to eliminate the risk of injury in the case of belt breakage.

Dimensions in millimetres
a)  Design using pressure roller b)  Design using pressing belt
Key
1 pressure roller 5 pressing belt
2 corrugating rollers 6 in-running nip
3 corrugated web 7 in-running nip on pressing belt
4 liner
Figure 8 — Corrugating unit
5.5.6 Walkway
The walkway on the inclined belt conveyor side (see Figure 9, item 7) shall have fall-off protection towards the
corrugating rollers. Cross beams provided for fall-off protection shall be at a height of 1,10 m (see Figure 9,
item 6). Intermediate rails or toe boards are not required.
5.5.7 In-running nips between glue rollers
In-running nips between glue rollers or between glue rollers and corrugating rollers that are accessible when
the gluing unit is lowered shall be safeguarded by fixed guards in accordance with ISO 12643-1.
Where lowering and raising the gluing unit is an automatic operation, the gluing unit shall not create any
hazard points; otherwise, this movement shall only be carried out under hold-to-run control at a maximum
speed of 5 m/min.
Where maintenance or cleaning operations are carried out with the interlocking guard covering the gluing unit
in an open position (see Figure 10), the glue rollers (applicator, scraper roll) shall only be allowed to rotate at a
maximum circumferential speed of 6 m/min. Glue rollers shall rotate in the same direction with no possibility of
access to an in-running nip between corrugating roller and glue roller.
Dimensions in millimetres
Key
1 single facer 5 bridge
2 corrugated web 6 fall-off protection
3 lower belt 7 walkway
4 upper belt
Figure 9 — Single facer with inclined belt conveyor
12 © ISO 2010 – All rights reserved

Key
1 corrugating roller
2 glue applicator
3 scraper roller
4 in-running nip
Figure 10 — Gluing unit
5.5.8 Hazard points between movable gluing unit and fixed machine part
The hazard points between the movable gluing unit and fixed machine parts (machine frame) shall be
safeguarded by one of the following measures:
⎯ a hold-to-run control with at least PL c of ISO 13849-1 or SIL 1 of IEC 62061;
r
⎯ interlocking guards;
⎯ a minimum distance of 25 mm.
5.5.9 Gluing unit cover
The cover of the gluing unit shall be designed to safeguard against gravity falls in accordance with
ISO 12643-1.
5.5.10 In-running nips between pulleys and fixed machine parts
The in-running nips between pulleys and fixed machine parts shall be safeguarded by one or both of the
following measures:
a) fixed nip bars designed in suitable sections and extending across the entire working width;
b) a minimum distance of 120 mm between pulleys or rollers and fixed machine parts.
If fixed nip bars are used, the clearance between the bar and the respective machine part shall not exceed
6 mm.
5.5.11 Steam pipes
When disengaging the steam couplings, the hazardous escape of pressurized steam shall be safeguarded by
the following measures:
⎯ coupling systems with relief valves on the ingoing and outgoing sides of the coupling; or
⎯ devices that ensure that the steam supply is cut off and steam is allowed to escape into the work area
safely.
Protection shall be provided to ensure that steam escaping unexpectedly during set-up is directed away from
personnel.
5.5.12 Warning signs
Single facers shall be provided with signs warning of a burn risk from steam or hot parts.
5.5.13 Drives and drive shafts
Drives and drive shafts shall be safeguarded by fixed guards that contain a movable guard or gate as part of
the fixed guard. The movable guard or gate shall be interlocked in accordance with ISO 12643-1.
5.5.14 Noise enclosures
Single facers should be positioned inside noise enclosures. The doors of the enclosure shall close
automatically. The enclosure shall be provided with signs pointing out the need to wear ear protection while
inside the enclosure. The web feed and take-off openings provided in the noise enclosure shall be designed to
minimize the escape of noise into the workroom.
NOTE In Europe, single facers are required to be inside noise enclosures.
Noise enclosures shall be designed such as to allow easy access for make-ready and inspection.
5.6 Inclined belt conveyor
5.6.1 In-running nips
The in-running nips on belts shall be safeguarded by fixed guards.
The in-running nip between the upper belt and the lower belt shall be safeguarded by off-setting the two
pulleys in such a way that the minimum clearance between the two rollers is 120 mm (see Figure 9).
There shall be no fixed parts in this area and the belt tension shall be sufficiently low to minimize the risk of
drawing in.
5.6.2 Accessible hazard points
Hazard points on the inclined belt conveyor that can be accessed from the bridge or the walkway shall be
safeguarded by fixed guards in accordance with ISO 12643-1.
5.7 Bridge
5.7.1 In-running nips
The in-running nips on belts shall be safeguarded by fixed guards in accordance with ISO 12643-1.
The in-running nips between drive rollers and guide rollers of the transport belts and fixed parts of the bridge
shall be safeguarded by fixed guards in accordance with ISO 12643-1.
14 © ISO 2010 – All rights reserved

5.7.2 Slots
The slots provided in the surface of the accessible part of a bridge shall not be wider than 50 mm. This
requirement does not apply to the walkways alongside the bridge.
NOTE Slots allow humidity to escape from the corrugated board.
5.7.3 Fall-off protection
Fall-off protection shall be provided on both sides of the bridge in accordance with ISO 14122-3.
5.7.4 Access stairs
Access stairs shall be provided for each section of the bridge. The maximum pitch angle specified in
ISO 14122-3 is 45°. However, the pitch angle may be increased to a maximum of 60° if justified by the results
of the risk analysis specified in ISO 12643-1. Access stairs shall be designed in accordance with ISO 12643-1.
Where access stairs connect to a walkway directly (i.e. without a platform), fall-off protection (i.e. a gate) that
closes automatically shall be provided.
5.7.5 Passage height underneath the bridge
The passage height underneath the bridge shall be a minimum of 2,10 m. Where this height requirement
cannot be met for design reasons, the parts below this height shall be provided with black-yellow padding for
protection against impacts.
5.8 Braking and web aligning section
The in-running nips between rollers and between rollers and fixed parts shall be safeguarded by the following
measures:
⎯ the use of guards in accordance with ISO 12643-1; or
⎯ maintaining a minimum distance of 120 mm.
5.9 Gluing machine
5.9.1 Steps and handles
Steps and handles meeting the requirements of ISO 12643-1 shall be provided to ensure safe threading of the
web and easy access to the gluing units for cleaning.
5.9.2 Hazard points
The hazard points between the glue rollers (see Figure 11, item 3), glue duct (see Figure 11, item 2) and fixed
machine parts that are accessible when the glue rollers are moved or removed, or when the glue duct is
swung down, shall be safeguarded by one of the following measures:
⎯ a hold-to-run control with at least PL c of ISO 13849-1 or SIL 1 of IEC 62061;
r
⎯ the limitation of automatic movements to 0,5 m/min.
An emergency stop device shall be provided within reach of the operator observing the operation.
5.9.3 Spring-loaded device
The automatic movement of the spring-loaded pressing device (see Figure 11, item 4) applying pressure to
the glue shall be safeguarded by one or both of the following measures:
⎯ guarding in accordance with ISO 12643-1;
⎯ allowing the pressing device to deflect at least 25 mm with a maximum spring force of 150 N.
5.10 Heating and pulling section
5.10.1 In-running nips
The in-running nip existing on the in-feed into the heating section between the upper belt (see Figure 11,
item 5) or the guide roller (see Figure 11, item 8) and the heating plates (see Figure 11, item 7) shall be
safeguarded by guards with a safety distance of 850 mm. The safety distance shall be measured from the
point at which the distance between the upper belt or guide roller and the heating plate is 50 mm. Trapping
hazards on the guide roller of the upper belt (see Figure 11, item 6) shall be eliminated by providing a fixed
guard.
5.10.2 Hazard points
The hazard points between the lower transport rollers or heating plate and the upper weighting device
(see Figure 11, item 9) shall be safeguarded by interlocking guards that meet the requirements of
ISO 12643-1. Guard openings and safety distances shall be in accordance with ISO 13857.
The hazard point (see Figure 11, item 10) between the upper belt (see Figure 11, item 11) and lower belt (see
Figure 11, item 12) at the transition point between the heating and pulling section shall be safeguarded by
interlocking guards.
5.10.3 Heating plates
Safety labels shall be placed at any position where it is reasonably foreseeable that personnel may come into
contact with the heating plates when guards are open.
5.10.4 Preventing the pressure device from falling
Where access to the area beneath the pressure device is required, one or more of the following measures
shall be taken to prevent the pressure device from falling due to gravity:
⎯ self-locking spindles for spindle drives;
⎯ check valves for hydraulic or pneumatic cylinders that are automatically overridden in the operating
condition;
⎯ other adequate safety measures.
For inspections, a manually operated mechanical device shall be used to secure the pressure device in a safe position,
e.g. locking pins or safety supports.
5.10.5 Crushing hazards
The crushing hazards caused by mechanical devices lifting the corrugated web off the heating plates
(see Fig
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