Shrink-wrapping method and apparatus

Details Shrink-wrapping method and apparatus Shrink-wrapping method and apparatus

1992-03-27

1993-08-24

Coan, James F.

Package making

Methods

With contents treating

53442, 53450, 53528, 53557, B65B 3102, B65B 4910, B65B 5302

Patent

active

052378004

ABSTRACT:
A thermal shrink film is continuously pulled out and is shaped into a tubular form. Individual items to be wrapped are fed into the tubular film sequentially and overlapping marginal portions of the tubular film extending lengthwise are sealed. The tubular film is sealed and cut transversely side of each of the items at the front end thereof and the tubular film is deformed inwardly by applying pressure thereto to decrease its internal volume. Then the tubular film is sealed and cut transversely of each item at the rear end thereof to form an intermediate package. The film of the intermediate package is shrunk by heating to thus shrink-wrap the item.

REFERENCES:
patent: 3420034 (1969-01-01), Saraisky et al.
patent: 3958390 (1976-05-01), Pringle, Jr. et al.
patent: 4044524 (1977-08-01), Segale et al.
patent: 4114348 (1978-09-01), Mahaffy et al.
patent: 4642969 (1987-02-01), Johnson
patent: 4964259 (1990-10-01), Ylvisaker et al.

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