Package making – Progressively seamed cover web or web folds – With closing of web between package units
Patent
1988-07-19
1990-05-15
Culver, Horace M.
Package making
Progressively seamed cover web or web folds
With closing of web between package units
53555, B65B 906, B65B 5130
Patent
active
049246593
ABSTRACT:
A film wrapping apparatus for wrapping articles and a method of wrapping articles in a heat-sealable thermoplastic packaging film. The apparatus has a film-hauling device in form of a conveyer having travelling clamping runs of upper and lower belts for clamping a free marginal selvage or edge part of a folded strip of packaging film having the parts thereof superposed. An infeed device positions articles successively at a position in which the superposed parts of successive lengths of the folded film are hauled over and under the articles respectively and envelope the articles as the successive lengths of the folded film are advanced intermittently by the film-hauling device from a web. The folded film successive lengths move longitudinally through a heat-sealing device having heat sealing jaws that have an L-shaped heat sealing element for sealing leading and trailing ends of the successive lengths of folded film as well as the open sides of each length to form individual packages containing therein respective packaged articles. The heat-sealing device jaws and the film-hauling device can be adjusted as to their height to handle different height articles being packaged. The heat-sealing device is raised and lowered manually in accordance with the level of travel of the advancing film and the height of the articles being packaged.
REFERENCES:
patent: 3494096 (1970-02-01), Suzuki
patent: 3665673 (1972-05-01), Billett et al.
patent: 4185443 (1980-01-01), Budzyn
patent: 4219988 (1980-09-01), Shanklin et al.
patent: 4494362 (1985-01-01), Koch
patent: 4658569 (1987-04-01), Hanagata
Burns Robert E.
Culver Horace M.
International Sankoh Kabushiki Kaisha
Lobato Emmanuel J.
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