Package making – Progressively seamed cover web or web folds – With closing of web between package units
Patent
1989-08-11
1991-05-21
Spruill, Robert L.
Package making
Progressively seamed cover web or web folds
With closing of web between package units
533737, 1565834, B65B 902, B65B 5112, B30B 500
Patent
active
050164260
ABSTRACT:
A biased seal for a form, fill and seal packaging machine includes an elongated seal bar which is attached to a support element via a plurality of connectors/retainers which are fixed to the seal bear, but movable with respect to the support element. A plurality of compression springs are positioned between the seal bar and the support element. The seal bar is movable on the connectors from a position wherein the seal bar is juxtapositioned against the sealing element and the compression springs are under compression and an extended position wherein the seal bar is displaced outward from the sealing elements by the bias in the compression springs. The support element is fixed to a slide assembly which is connected to an activator rod via an adjustment bracket. When used in combination with an opposing seal bar, the combination of the adjustable bracket assembly and the biased seal bar allows for variable amounts of pressure to be applied to films which are sealed together between the bias seal bar and the further seal bar.
REFERENCES:
patent: 2361052 (1944-10-01), Patterson
patent: 2624992 (1953-01-01), Salfisberg
patent: 2655979 (1953-10-01), Eaton
patent: 2764862 (1956-10-01), Rado
patent: 3287199 (1966-11-01), Virta
patent: 3583126 (1971-06-01), McCollough
patent: 3779838 (1973-12-01), Wech
patent: 3874976 (1975-04-01), MacFarland
patent: 4637199 (1987-01-01), Steck et al.
patent: 4862672 (1989-09-01), Lane, Sr.
Bianca Beth
Boswell Herb
Spruill Robert L.
W. A. Lane Inc.
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