Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1976-10-05
1977-08-30
Lazarus, Richard B.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264DIG71, 264230, 29 2513, B29C 1704
Patent
active
040455300
ABSTRACT:
Method for applying protective sleeves to combustion-type photoflash lamps herein there is placed proximate a mold means a strip of organic plastic having a thickness of from about 0.3 to 0.8mm, a tough-plastic characteristic at a temperature of from about 160.degree. to 200.degree. C, a tough-elastic characteristic at a temperature of from about 90.degree. to 125.degree. C, and a freezing temperature of from about 65.degree. to 70.degree. C. The strip is heated to the tough-plastic temperature and drawn into the mold means to form a series of plastic cups which have a dimension slightly smaller than the lamps to be sleeved. When the temperature of the formed cups is in the tough-elastic range, they are expanded to be slightly larger than the lamps to be sleeved, and are then frozen. The lamps are then placed into the cups which are then heated to cause them to shrink-fit onto the lamps. The sleeved lamps are then severed from the residual plastic strip.
REFERENCES:
patent: 2027962 (1936-01-01), Currie
patent: 3442987 (1969-05-01), Sentementes et al.
patent: 3894902 (1975-07-01), Hough et al.
patent: 3902946 (1975-09-01), Audesse et al.
patent: 3962766 (1976-06-01), Pompidor et al.
Lazarus Richard B.
Palmer W. D.
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen m.b.H.
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