Method of heat sealing thermoplastic sheets together using a spl

Details Method of heat sealing thermoplastic sheets together using a spl Method of heat sealing thermoplastic sheets together using a spl

1975-12-17

1976-11-02

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

156272, 156306, 219121L, 219121LM, 264248, 264DIG57, 331 945G, 331DIG1, 4251744, B29C 2702, B29D 900

Patent

active

039897788

ABSTRACT:
Thermoplastic materials, particularly material in sheet form, may be sealed or thermowelded together using the energy from a single laser beam source by splitting the beam and directing it by mirrors to desired seal areas on the opposed sides of the materials to be sealed. The beam may be split in proportion to the thickness of the respective materials. Heating the opposed sides of materials to be sealed avoids the problem of overheating or burning the side to which energy is applied.

REFERENCES:
patent: 3382343 (1968-05-01), Muncheryan
patent: 3410203 (1968-11-01), Fischbeck
patent: 3604890 (1971-09-01), Mullaney
patent: 3663795 (1972-05-01), Myer
patent: 3769117 (1973-10-01), Bowen et al.
patent: 3778585 (1973-12-01), Mallozzi et al.
patent: 3790744 (1974-02-01), Bowen

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