Method of making heat sealed produce bags

Details Method of making heat sealed produce bags Method of making heat sealed produce bags

1997-02-21

2000-05-09

Johnson, Linda

Package making

Methods

Forming or partial forming a receptacle and subsequent filling

53477, 533735, B65B 4304

Patent

active

060586818

ABSTRACT:
A method is provided for bagging produce in sealed bags in an automated manner. The method comprises the following steps. A pair of thermoplastic sheets are advanced along a process line with the sheets being in parallel, abutting relation. A longitudinal seal line is formed between the sheets near to but spaced from the lower edges thereof to define a bag header. Transverse slits are formed in both of the sheets together, with the edges of the slits being heat sealed, as with a hot knife, to form separate bags between the slits. The slits extend across the lower edges of the sheets, but are spaced from the upper edges. Thus, the sheets remain integral despite the formation of multiple bags therein. Produce is dropped between the thermoplastic sheet upper edges into the bag. The bags then may be horizontally slit to substantially intersect the transverse slits and to separate a horizontal strip of the sheets including the upper edges, while bottom-supporting the bags. Following this, the bags are heat sealed along the new upper edges formed by the horizontal slitting. By this process, bags with top headers may be manufactured and filled by an automated process.

REFERENCES:
patent: 3319538 (1967-05-01), Bodolay et al.
patent: 3817017 (1974-06-01), Titchenal
patent: 5722217 (1998-03-01), Cloud

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