Ykk Corporation

Yoshida Kogyo K.k.

Masahide Ozaki

Makoto Yamazaki

Shinichi Kojima

Kenji Dono

Tatsuo Ito

Toshimasa Konaka

Akio Yunoki

Takuya Nagatani

Masanobu Mizuno

Masanori Uji

Yoshie Numata

Hidenori Kyozuka

Hiroshi Matsuzawa

A method for manufacturing a waterproof fastener tape includes the steps of: forming a viscous waterproof layer on a releasable substrate; attaching the viscous waterproof layer formed on the releasable substrate to a fastener tape base fabric, and peeling the releasable substrate off the viscous waterproof layer that has been attached to the fastener tape base fabric; promoting curing of the viscous waterproof layer formed on the fastener tape base fabric to form a reduced-viscosity waterproof layer; and after the promoting of curing of the viscous waterproof layer, covering an exposed surface of the reduced-viscosity waterproof layer formed on the fastener tape base fabric with a releasable cover.

Method for manufacturing waterproof fastener tape

A weighing/feeding apparatus for mixing two or more different types of powder/chip by respective given amounts and feeding a weighing vessel with the mixture efficiently with accuracy is provided. The apparatus includes a weighing/feeding section arranged between a transfer path for transferring empty weighing vessels and a delivery path for delivering weighing vessels loaded with the powder/chip, the weighing/feeding section being connected to a powder/grain feeding path, a-plurality of powder/chip feeding units being arranged along the feeding path and provided with respective conduits, a weighing unit carrying thereon the empty weighing vessel which is reciprocated along the feeding path to fill the empty weighing vessel with a predetermined amount of powder/chip of a plurality of desired types before returning to the weighing/feeding section and then the weighing vessel loaded with the powder/chip is delivered to the delivery path.

Powder/chip weighing/feeding apparatus

This invention provides a method of weighing powder/chip, in which the powder/chip can be fed from the conduit into the weighing vessel accurately and efficiently without being affected by the state of the conduit, that of the weighing vessel and that of ambient air. With the method, the powder/chip is weighed by means of the conduit arranged below a storage section and adapted to be tilted around a pivot according to a command sent from a weighing section to let the powder/chip fall through a discharge port at an end of the conduit into a weighing vessel placed on the weighing section. The conduit is tilted sequentially at least by three different feeding angles from large, small to minute to let the powder/chip fall by a large volume, a small volume and a minute volume respectively.

Powder/chip weighing method

A method of forming successive space portion in a slide fastener chain, comprising: positioning the chain in such a manner that an element contiguous to the backward end of a prospective space portion is brought into engagement with a positioning pin upstream of a cutting unit; positioning the chain in such a manner that an element contiguous to the forward end of the prospective space portion is out of engagement with another positioning pin downstream of the cutting unit, and then positioning the chain, as the feed roller is rotated forwardly to extend the chain so that the positioning pin is inserted between the elements, whereupon the downstream positioning pin is brought into engagement with the element adjacent to the prospective space portion as the feed roller is rotated backwardly to restore the slide fastener chain; and cutting off elements of the prospective space portion and removing the cut elements from the prospective space portion.

Method of forming space portions in slide fastener chain

A process for the manufacture of slide fasteners from an elongate stringer chain is disclosed in which the stringer chain is maintained in tensionless suspension at predetermined locations along the path of its movement through various stages of production. A plurality of processing units are controlled so as to operate in synchronized relation to one of such units which has a slowest cycle of operation.

Process for the manufacture of slide fasteners

Growing community of inventors

Toyama, Japan

Masahide Ozaki