ASTM D2050-04

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Designation:D2050–04
Standard Terminology Relating to
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Subassemblies
This standard is issued under the fixed designation D 2050; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope bridge top stop, n—a part affixed immediately above the
chain, holding the tops of two stringers together and pre-
1.1 This terminology covers all terminology pertaining to
venting the slider from leaving the chain. (See Fig. 2.)
items that are considered subasseblies in the manufacture of
cam lock slider, n—a slider that incorporates a curled projec-
textile products (not including seams and stitches). Textile
tion or projections on the pull that extends through a window
joining structures (seams and stitches) are discussed in detail in
or windows to effect a locking action by pressing against the
1.2 The principle parts of zippers defined in this terminol-
interlocking elements when the cam lock slider is in the
ogy are illustrated in Figs. 1-9. These figures are descriptive
locked position.
only and are not intended to be restrictive as to design.
chain, n—the assemblage formed by interlocking several
2. Referenced Documents elements of two stringers.
2
chain thickness, n—themeasurementfromfronttobackofthe
2.1 ASTM Standards:
chain.
D 6193 Practice for Stitches and Seams
chain width, n—the measurement between the shoulders of
3. Terminology
the interlocked elements or between the outermost edges of
the bead if the bead extends beyond the elements.
automatic lock slider, n—a slider that provides involuntary,
connecting ring, n—adeviceshapedliketheletter“D”usedto
positive locking action on the chain when the pull is
secure a pull, having more than one component in its design,
released.
to the bail of the slider.
bail, n—a portion or portions of the slider to which the pull or
continuous element, n—aconfiguredelementformedcontinu-
pulls are attached. (Syn. lug.)
ously along a length of monofilament. (Compare separate
bead, n—in a separate element zipper, an enlarged section on
element.)
the inner edge of each tape to which interlockable elements
continuous element zipper, n—a zipper consisting of two
are affixed.
continuously formed elements, each attached to one of the
bead, n—in continuous element zippers, an optional enlarged
opposing edges of two tapes, which are engaged and
sectionofthetapelocatedattheouteredgeofthecontinuous
disengaged by the movement of a slider. (See Fig. 3.)
interlockable elements and against which the slider flanges
(Compare separate element zipper.)
bear.
cord, n—a strand of multiple yarns for use in forming a bead.
bottom assembly, n—the components of the lowermost part of
crimp, n—as applied to a continuous element zipper, the
a slide fastener which determine whether the slide fastener
predetermined formation of the monofilament cross-section
will be non-separable or separable. (See also non-separable
at the point where the continuous element is interlocked.
zipper and separable zipper.)
cut-off, n—the measurement of a separate element from the
bottom stop, n—a part affixed to both stringers immediately
head side to the pocket side of the legs.
below, or over the chain, holding the two stringers together
diamond, n—thewedge-shapedportionofasliderbetweenthe
at the bottom and preventing the slider from leaving the
throats.
chain. (See Fig. 1.)
element, n—a device designed for interlocking, capable of
being affixed along the edge of a tape. (Compare continuous
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ThisterminologyisunderthejurisdictionofASTMCommitteeD13onTextiles element and separate element.) (See Fig. 4.)
and is the direct responsibility of Subcommittee D13.54 on Subassemblies. These
exposed tape width, n—the part of the tape extending beyond
definitions were developed in cooperation with the American Fastener and Closure
the shoulders of the interlocking elements to the outer tape
Assn. Inc.
edge.
Current edition approved Oct. 1, 2004. Published October 2004. Originally
approved in 1961. Last previous edition approved in 1997 as D 2050 – 03
fixed retainer, n—a device permanently attached to the re-
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tainer pin at the bottom of one stringer. (See Fig. 5.)
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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D2050–04
FIG. 1 Bottom Stop
FIG. 2 Bridge Stop
FIG. 3 Principl
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