Arrangement for enveloping objects in enveloping material taken

Details Arrangement for enveloping objects in enveloping material taken Arrangement for enveloping objects in enveloping material taken

1992-05-20

1993-04-06

Culver, Horace M.

Package making

Progressively seamed cover web or web folds

With closing of web between package units

533737, 533742, 533749, 1565831, B65B 5130, B65B 5114, B65B 6110, B65B 902

Patent

active

051992477

ABSTRACT:
An arrangement for enveloping an object located between two heat weldable webs of enveloping material includes two coacting welding jaws for joining the webs together in their transversal direction on mutually opposite sides of the object. The welding jaws extend in the transverse direction of the webs, across the whole width thereof. One of the jaws is a wire-carrying jaw which supports a freely extending heating wire, and the other jaw is forked and has two legs. The jaws are moveable between a starting position on opposite sides of the webs, and a web welding position in which the webs are held together with the free ends of the fork legs in abutment with one side of the webs and with the heating wire located at the mouth region of the fork gap and in abutment with the other side of the webs. The wire functions to weld said material webs together and to melt-off the webs within the weld region. In the welding position, at least one of the jaws is biased by a spring means towards a further position in which the wire is located within the forked jaw, between the legs thereof at a distance from the mouth of the fork gap.

REFERENCES:
patent: 3015601 (1962-01-01), Fener
patent: 3191356 (1965-06-01), Zelnick et al.
patent: 3284987 (1966-11-01), Sigmon
patent: 3287199 (1966-11-01), Virta
patent: 3397505 (1968-08-01), Critchell
patent: 3449887 (1969-06-01), Abramson
patent: 3874976 (1975-04-01), MacFarland, Jr.
patent: 4512138 (1985-04-01), Greenawalt
patent: 4996819 (1991-03-01), Davis
patent: 5031379 (1991-07-01), Lundblad et al.

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