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Flat Plate Radiant Heater

IP.com Disclosure Number: IPCOM000098682D
Original Publication Date: 1959-Oct-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Donelson, CL: AUTHOR

Abstract

Images recorded on a heat sensitive film are developed one frame at a time upon positioning heating shoes 10. The latter are mounted on a pair of arms 20 each pivotally secured to a base and arranged with overlapping ends 22, which are coupled to a solenoid armature 24. Energizing the solenoid draws 10 together into contact (at their edges) with the film to radiate heat onto only one frame of film.

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Flat Plate Radiant Heater

Images recorded on a heat sensitive film are developed one frame at a time upon positioning heating shoes 10. The latter are mounted on a pair of arms 20 each pivotally secured to a base and arranged with overlapping ends 22, which are coupled to a solenoid armature 24. Energizing the solenoid draws 10 together into contact (at their edges) with the film to radiate heat onto only one frame of film.

Each heater shoe 10 includes a heating unit 11, a radiating plate 12 and a frame 13. The heating unit 11 is comprised of a planar piece 15 of insulating material such as mica on which is wound a lattice of Nichrome wire 16 spaced, for example, approximately. 050 inches apart. Radiating plate 12 is comprised of a sheet 17 of copper or other suitable material which uniformly diffuses and radiates heat. The back side of 17 is coated with an insulating layer 18 of material, such as epoxy silicone resin, which prevents plate 12 from shorting out the turns of wire 16 when heating unit 11 is placed in contact with layer 18.

Frame 13, formed from a suitable heat insulating material such as phenolic, is provided with a ridge 19 located circumferentially around its inside surface to space plate 12 slightly away from the film when frame 13 is positioned in contact with it. Although both of shoes 10, as shown, are comprised of the foregoing elements, one of the shoes could be made simply from a black insulating material, if desired.

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