Taiyo Shokai Co., Ltd.

Hitachi, Ltd.

Masami Onishi

Ryosuke Fujiwara

This invention provides a packing machine with a supporting device for supporting a foremost single bag section of a strip-like plastics bag material. The machine comprises a pair of intermittently operated pinching rollers for intermittently transferring the bag material and a pair of heat-sealers provided thereunder for heat-sealing the foremost single bag section after goods have been packed therein. The bag-supporting device is provided under one of the heat-sealers and comprises a supporting member for supporting the bottom of the bag section when goods are packed therein, the supporting member being arranged to be swung about a horizontal axis and operatively connected with a reciprocating crank mechanism.

Packing machine with bag-supporting device

A packing machine is disclosed in which an apparatus for automatically stopping a pair of intermittently operated pinching rollers for transferring a strip-like plastics bag material is provided. The apparatus is a kind of emergency stop and is arranged to be automatically operated in case the bag material loaded in the machine has been broken.

Packing machine with apparatus for automatically stopping bag material

This invention provides a method of transferring a strip-like plastic bag material in a packing machine. The method comprises the steps of transferring the bag material by a pair of intermittently operated pinching rollers. The bag material comprises a series of interconnected bags each having a heat-sealed bottom portion with a flap-like margin. The flap-like margin is raised during transfer of the bag material by guide means. The bottom portion is then detected by means of a microswitch having an elongated contact adapted to be releasably engaged with the flap-like margin as the flap-like margin is raised by the guide means during transfer of said bag material. The bag material is then stopped for a packing operation in response to detection by the microswitch of the bottom portion.

Method of transferring strip-like plastics bag material in packing

This invention provides an apparatus for transferring a strip-like plastic bag material in a packing machine. The apparatus comprises a pair of intermittently operated pinching rollers for intermittently transferring the bag material, said bag material comprising a series of interconnected bags each having a heat-sealed bottom portion with a flap-like margin, a mechanism for raising said flap-like margin during transfer of said bag material, a microswitch for detecting said bottom portion, said microswitch having an elongated contact adapted to be releasably engaged with said flap-like margin as said flap-like margin is raised during transfer of said bag material and means for stopping said bag material in response to detection by said microswitch of said bottom portion.

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Tokyo, Japan

Masami Onishi