Package making – Progressively seamed cover web or web folds – With closing of web between package units
Patent
1986-09-26
1988-10-04
Culver, Horace M.
Package making
Progressively seamed cover web or web folds
With closing of web between package units
425520, B65B 902
Patent
active
047748001
ABSTRACT:
Packaging of series of relatively small articles between long webs of wide packaging laminates having faces of resilient heat sealable foam. One web is fed foam-face-up across a table, the articles to be packaged placed on it in spaced locations, heated melting shoes applied to web edges to melt the foam surfaces there, and a second web applied foam-face-down over the spaced articles and heat sealed to the lower web at its melted edges. Melting shoes can have their surfaces treated to make them essentially non-wettable by the melted foam. Transverse heat sealing and severings are effected between successive articles. The heat sealings can be set by cold pressings. Web backings can be made relatively non-porous to minimize bleed-through of melted foam. Before sealing, sandwiched articles can be pressed between upper and lower resilient fingers to urge articles to level at which they project up as much as they project down, from plane of web edges.
REFERENCES:
patent: 2208951 (1940-07-01), Tamassy
patent: 2438089 (1948-03-01), Carson
patent: 2468517 (1949-04-01), Salfisberg
patent: 2586445 (1952-02-01), Stalter
patent: 2586580 (1952-02-01), Truscott
patent: 2597041 (1952-05-01), Stokes
patent: 2597042 (1952-05-01), Stokes et al.
patent: 2608405 (1952-08-01), Salfisberg et al.
patent: 2737764 (1956-03-01), Lewis
patent: 3735551 (1973-05-01), Pratt
Culver Horace M.
The Crowell Corporation
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