Adjustable length heat tunnel for varying shot lengths

Details Adjustable length heat tunnel for varying shot lengths Adjustable length heat tunnel for varying shot lengths

1996-04-17

1999-04-13

Jeffery, John A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

425384, B29C 3302, F27B 928

Patent

active

058939946

ABSTRACT:
An improved heat tunnel is provided for use with a thermo-forming press. The heat tunnel includes a first oven body having a heat source therein for applying heat to a web of thermo-formable material as the web is supported therein. The tunnel includes a second oven body having a heat source therein for applying heat to a web of thermo-formable material as the web is supported therein. Furthermore, the tunnel has an adjustable length tunnel body carried between the first and second oven bodies and configurable to adjust the overall length of the heat tunnel so as to realize a desired delivery of heat to a web of material being passed there through.

REFERENCES:
patent: 3721178 (1973-03-01), Szabrak et al.
patent: 3830611 (1974-08-01), Irwin
patent: 3876361 (1975-04-01), Irwin
patent: 4105386 (1978-08-01), Thiel et al.
patent: 4608009 (1986-08-01), Whiteside et al.

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