Method and apparatus for heating thin plastic sheet with air dif

Details Method and apparatus for heating thin plastic sheet with air dif Method and apparatus for heating thin plastic sheet with air dif

1998-10-22

2000-06-06

Jeffrey, John A.

Electric heating

Heating devices

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

392417, 264544, 264DIG46, 34360, 34621, 425DIG13, 425384, B29C 1700

Patent

active

060721588

ABSTRACT:
A method and apparatus heats a thin sheet of material prior to subjecting the sheet to a process for forming the sheet into a desired shape, such as by vacuum forming. The sheet is supported in a generally horizontal manner during transport through the apparatus, for example on a pair of conveyor chains or belts which carry and provide support to the longitudinal edges of the sheet by gripping same. The sheet is heated from above and below by heating elements and a diffuser plate is located between the upper and lower heating elements, and beneath the downwardly facing side of the sheet. The diffuser plate permits air flow therethrough from an air source and forms a film of heated air adjacent the downwardly facing side of the sheet to support the sheet and prevent excessive downward sagging thereof during heating thereof.

REFERENCES:
patent: 2928124 (1960-03-01), Hugger
patent: 3048383 (1962-08-01), Champlih
patent: 3664791 (1972-05-01), Brown
patent: 3728799 (1973-04-01), Streltsov
patent: 3867085 (1975-02-01), Lynch
patent: 4101252 (1978-07-01), Brown
patent: 4148575 (1979-04-01), Siryj
patent: 4371246 (1983-02-01), Siryj

Affiliated with

Also associated with

Rating

Method and apparatus for heating thin plastic sheet with air dif does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for heating thin plastic sheet with air dif, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for heating thin plastic sheet with air dif will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2215088