Manufacturing container or tube from paper; or other manufacturi – Container making – Pliable container
Patent
1988-11-14
1989-12-26
Olszewski, Robert P.
Manufacturing container or tube from paper; or other manufacturi
Container making
Pliable container
219243, 493205, B31B 164
Patent
active
048895229
ABSTRACT:
The rotary bag making machine of the present invention is adapted to make side seal bags having a plastic drawstring through a hem in the top of the bag. More specifically. The rotary bag machine of the present invention includes a two part, elongate sealing bar having sealing edges, the first part of which is heated to a first temperature for sealing two layers of plastic bag material and the second part of which is heated to a second higher temperature for sealing the six layers which are present when hems are formed with inserted drawstrings. The second part of the seal bar is not only designed to form the seal but to heat weld together the drawstring plastic so that it will not separate or tear apart when the bag is gathered and subsequently tied with the drawstring.
REFERENCES:
patent: 2169936 (1939-08-01), Wagner
patent: 4567984 (1986-02-01), Gietman
patent: 4642084 (1987-02-01), Gietman
patent: 4649259 (1987-03-01), Zurn
patent: 4664649 (1987-05-01), Johnson et al.
Information Brochure-"Drawstring Bags from PE Film with Ribbon of HDPE" Windmoller & Holscher GmbH Bielefeld, updated.
Cooper, III John C.
Custom Machinery Design, Inc.
Lavinder Jack W.
Olszewski Robert P.
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