Sealing system for forming thermal seals and methods of...

Details Sealing system for forming thermal seals and methods of... Sealing system for forming thermal seals and methods of...

2005-07-12

2005-07-12

Jeffery, John A. (Department: 3742)

Electric heating

Heating devices

Combined with pressure application means

C219S543000, C156S499000, C156S583100

Reexamination Certificate

active

06917014

ABSTRACT:
The invention is a sealing system and a method of operation thereof. A sealing system which forms spaced apart thermal seals along a moving at least one web (60) by contact of the moving the at least one web with heated portions (74) of sealing elements (56) mounted on a sealing wheel (50) during rotation in accordance with the invention includes seal forming elements (56) which peripherally contact the at least one web to form the thermal seals by heat transfer to the at least one web; and wherein each seal forming element has an outer section (62) on which is located at least one electrical heater (78), an inner section (64) which contacts the sealing wheel and an intermediate section (70) which includes thermal insulation (68) which insulates the outer section from the inner section.

REFERENCES:
patent: 2509439 (1950-05-01), Langer
patent: 2606987 (1952-08-01), Winstead
patent: 2689803 (1954-09-01), Ackerman
patent: 3054441 (1962-09-01), Abraham et al.
patent: 3506771 (1970-04-01), Cole, Jr.
patent: 5415724 (1995-05-01), Perrett
patent: 5475199 (1995-12-01), Buchanan
patent: 6657165 (2003-12-01), Makutonin et al.
patent: 1565224 (1970-10-01), None
patent: 2524840 (1976-08-01), None
patent: 546495 (1993-06-01), None
patent: 2332844 (1999-06-01), None

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