Method of transferring strip-like plastics bag material in packi

Details Method of transferring strip-like plastics bag material in packi Method of transferring strip-like plastics bag material in packi

1980-05-16

1982-06-29

Coan, James F.

Package making

Methods

Forming or partial forming a receptacle and subsequent filling

53 69, 53 76, 53384, 53385, B65B 4312

Patent

active

043366813

ABSTRACT:
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.

REFERENCES:
patent: 3477196 (1969-11-01), Lerner
patent: 3481102 (1969-12-01), Dolman
patent: 3579948 (1971-05-01), Lerner
patent: 3754370 (1973-08-01), Hanson

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