Yoshida Kogyo K.k.

Ykk Corporation

Kazuki Kuse

Hiroshi Yoshida

Shunji Akashi

Yozo Okada

Tatsuo Ito

Hideo Shimai

Hiroshi Mizuno

Keiichi Yoshieda

Masao Matsumoto

Mitsuru Yamakawa

Akiyoshi Kando

Osamu Fujii

Toyoo Morita

Keiichi Keyaki

Kozo Watanabe

Makoto Yamazaki

Michio Ito

Shigeru Funakawa

Masanori Hirasawa

Minoru Hirota

A method for forming ends of a slide fastener chain wherein, coil-shaped fastener elements such as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, each end of the fastener elements is stabilized, so that the resultant slide fastener is safe.

Method for forming an end of slide fastener chain

According to the fastener chain, method and apparatus for forming ends thereof, coil-shaped fastener elements as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The coil-shaped fastener elements are cut off at leg portions, each of which is in contact with the fastener tape, at ends of the fastener elements, so that cut end portions are formed. These cut end portions are pushed inward of the side edge portions, and then, the leg portions and inverted portions thereof are fused to the fastener tapes by heating. As a result, a form of each end of the fastener elements is stabilized, so that the resultant slide fastener is good in safety.

Apparatus for end forming of slide fastener chain

Slide fastener chain, method and apparatus for forming end thereof

By fusing reinforcing tapes with bottom end attaching portions of fastener tapes by pressurizing heating means with different pressures (i.e., high and low), thus weakening of attaching portions can be prevented. Core threads are fitted to side edges of fastener tapes to form core portions. Reinforcing tapes formed of thermoplastic elastomer film or thermoplastic resin film are fused to wrap tape end portions including the core portions so as to form the bottom end attaching portions. The reinforcing tapes fused the core portions and vicinity portions to the fastener tapes with a low pressure and at tape main body portions to the fastener tapes with a high pressure, thereby making the core portions and the vicinity portions flexible and thick and making the tape main body portions stiff and thin to form stepped portions. The stepped portions are positioned outside flanges of a slider. A box and a box pin are attached to one of the core portion and core portion vicinity portions, and an insert pin is attached to the other core portion and vicinity portions, thereby preventing the attaching portions from being cracked and weakened.

Bottom end stop attaching portions of fastener tapes and a slide fastener chain including the same

In forming an element-free space portion in a continuous fastener chain, legs of a number of metallic fastener elements, which legs exist on one side of the fastener chain are cut by a pair of cutting blades, and then coupling heads of the fastener elements and the legs extending from the coupling heads and existing on the other side of the fastener chain are removed from cores of fastener tapes while being clamped by a punch and a die. Therefore, it is possible to remove the fastener element portions from the fastener tapes without damaging the cores and not to require so high precision in positioning the fastener elements at a cutting station, thus the structure of a slide fastener chain manufacturing machine can be simple and hence the rate of production is improved.

Method and apparatus for forming element-free space portion in slide

A slide fastener comprises a pair of dyed fastener tapes each having a row of coupling elements attached to the fastener tape along a longitudinal edge thereof and at least a pair of reinforcing tapes attached to a terminal part of each of the fastener tapes. The reinforcing tape comprising a transparent elastomer film and an adhesive layer superposed on the reverse side of the elastomer film is attached by welding or fusion bonding to the terminal part of the dyed fastener tape through the medium of the adhesive layer and has a knurled surface at the welded part.

Reinforcing tapes for slide fastener

A synthetic resin pelletizing machine includes an extrusion cylinder forming, with a horizontal plane, an installation angle .theta. which is in the range of 0.degree.&lt;.theta.&lt;90.degree., a raw material feed passage extending upwardly from said extrusion cylinder at a predetermined angle relative to a longitudinal axis of said extrusion cylinder, and a cooling unit disposed below a die head and having a double bath construction composed of a first cooling bath and a second cooling bath disposed in the first cooling bath. The pelletizing machine thus constructed is compact in size and is capable of assuring a smooth feed of a raw material to the extrusion cylinder as well as a smooth passage of an extruded strand through the cooling unit.

Synthetic resin pelletizing machine

In a method and apparatus for manufacturing a slide fastener chain having rows of coupling elements and members of a separable bottom end stop assembly, two positioning holes are formed at predetermined positions on reinforcing films attached to a pair of fastener tapes. The positioning holes are used to position the fastener tapes relative to a molding unit with respect to each individual slide fastener length. Thus, even when a positioning error is produced due to a change in tension on the fastener tapes being processed, such error is limited to a small extent which is created only in the individual slide fastener length. Thus, the coupling elements and the first pin member and the second pin member can be molded precisely. Additional to its primary positioning function, the positioning holes further have a function to provide a reference when a pair of U-shaped cutout portions is formed in the fastener tapes to facilitate smooth and reliable attachment of a box relative to the first pin member and the second pin member, and also have a function to provide a reference when the slide fastener chain is cut off at the cutout portions transversely across the fastener tapes.

Method and apparatus for manufacturing slide fastener chain with

A method of forming end stops to a continuous slide fastener chain including element-free space portions at longitudinally spaced intervals, wherein as the chain is fed in the backward direction, a pair of rows of interengaged coupling elements extending on the downstream side of an element-free space portion is spread open by a chain splitting apparatus for subsequent molding of a separable end stop whereas a pair of rows of coupling elements on the upstream side of the element-free space portion is kept in engaged condition. After the separable end stop is molded, the chain is fed in the forward direction during which time a sprue portion and gate portions formed integrally with the separable end stop are caught by a chain splitting member of the chain splitting apparatus. The chain splitting member is then lowered to automatically remove the sprue portion and gate portions from the separable end stop.

Method of forming end stops molded on a slide fastener chain and a chain

A vertical-type injection molding machine comprising a lower fixed mold half mounted on a machine base, an upper movable mold half situated upwardly of the lower fixed mold half in confronting relationship therewith, and a material reservoir for storing a cleaning material and a various kinds of molding materials individually. The material reservoir has a switching device for switching one kind of molding material over another. The injectin molding machine also comprises an injector having a nozzle, an injection cylinder, and a molding material supply unit connected to the switching device via a material supply pipe, a device for opening and closing a tip of said nozzle during the switching of the molding materials, and a discharged material receiving device reciprocatingly movable between a position right under the nozzle tip and a position right above a material discharge portion on the side of said upper movable mold half and adapted to be inverted by 180.degree..

Vertical injection molding machine having a discharge material receiving

A lower mold attachment plate, on the upper surface of which the fixed mold half is attached, is fixed to a machine base. An upper mold attachment plate, to which the movable mold half is attached in opposite to the fixed mold half, is movable upwardly and downwardly by mold moving cylinders. A rotary disc, which has plural injection cylinder insertion holes in the same circle in vertical alignment with plural injection cylinder insertion holes of the upper mold attachment plate, is rotatably pivoted on the upper surface of the upper mold attachment plate. Plural injection units arranged over the rotary disc in predetermined distances along the circle are joined with the rotary disc as a unit. As the rotary disc is rotated to a divided angular position, a slide fastener chain is conveyed along the extension of the chain travelling path, by a predetermined length at every injection molding by means of chain conveyer.

Vertical injection molding machine

A rack for storing a plurality of spools with elongated strips wound therearound comprises a box-like frame including a pair of parallel spaced plates; a plurality of partitions, each of which has on one of its surfaces a support axle for rotatably and releasably holding the spool; and means for releasably fastening the partitions in a parallel spaced relation to each other between the plates. The rack further includes elongated lock plates which have slots and notches formed in and arranged at uniform intervals longitudinally of the elongated lock plates. The lock plates are attached to the rack by pins protruding through the slots for slidably holding the lock plate to a front surface of the rack.

Spool storage rack with removable supporting partitions

A method of and apparatus for manufacturing slide fasteners of selected product lengths from an elongate continuous stringer chain, the method comprising selecting predetermined fastener component parts from among a plurality of such respective component parts which differ in type, form, material and color, feeding and applying the selected parts one at a time to the stringer chain. The apparatus reducing the method to practice comprises operating units arranged to selectively feed and apply the component parts under computer program control.

Method of and apparatus for manufacturing slide fasteners

An apparatus is disclosed for storing slide fastener sliders preparatory to application thereof onto a stringer chain, the apparatus comprising a plurality of slider stockers removably mounted on a stocker holder and a slider supply including a chute, the slider stockers being movable successively into operative position registering with the chute to receive therefrom a supply of sliders.

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Toyama, Japan

Kazuki Kuse