Package making – Interrelated or safety controls
Patent
1975-10-06
1977-07-19
Gilden, Leon
Package making
Interrelated or safety controls
53 33, 53184R, 53222, 53292, B65B 4330
Patent
active
040359859
ABSTRACT:
An apparatus for wrapping goods in a sheet of a stretchable film material comprises a resiliently deformable pad above a wrapping station, a gripping device for holding fast edge portions of the sheet so that the sheet extends horizontally beneath the pad, a mechanism for upwardly stretching a central portion of the sheet to form a bubble until the top of the bubble reaches the pad, a mechanism for lifting goods to be wrapped into the bubble until the top of the goods is urged against the inner surface of the top of the bubble and two pairs of tucking plates disposed to form a rectangle around the lower part of the bubble and movable inwardly to tuck the marginal portions of the bubbled sheet against the bottom of the goods. The goods are not brought into frictional engagement with the sheet during the stretching whereby the sheet is stretched uniformly throughout the bubbled central portion thereof. The marginal portions of the sheet thus tucked present such a symmetrical regular folding pattern as seams appearing in one surface of closed adhesive envelope.
REFERENCES:
patent: 2615200 (1952-10-01), Cloud
patent: 2757499 (1956-08-01), Albrecht
patent: 3662513 (1972-05-01), Fabbri
Aoyama Kozo
Iijima Hiroshi
Kikuchi Shizuo
Asahi-Dow Limited
Gilden Leon
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