Electric heating – Heating devices – Combined with diverse-type art device
Patent
1994-06-23
1996-07-16
Walberg, Teresa J.
Electric heating
Heating devices
Combined with diverse-type art device
220201, 156344, H05B 100
Patent
active
055369170
ABSTRACT:
An assembly (5) has two or more plastic parts joined together. One of the plastic parts (20) has an electrical heating element (31) whose function is to soften a portion of the plastic when the heating element is electrically energized. Once the plastic is softened, the two parts can be separated and the assembly disassembled. When the two parts are joined together with snap-fit joints, the snap-fits have a heating element to soften a portion of the snap-fit (24) when the heating element is electrically energized, thereby allowing the housing to be opened and separated. If the two parts are ultrasonically welded together to form a housing, a heating element is located therein to soften the ultrasonically welded portion (44), thereby allowing the two halves of the housing to be separated. The heating element can be a nichrome or thin film resistor that is energized by a source (33) located within the housing, or by an power source external to the housing, or it may be inductively coupled to the power source.
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U.S. Postal System Express Mail envelope "opening fastener" No. 102595-93-B-0453 (EP-13A-Aug. 1993).
Dorinski Dale W.
Suppelsa Anthony B.
Dorinski Dale W.
Easthom Karl
Motorla, Inc.
Walberg Teresa J.
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