Method of making a disposable cassette with negative head height

Details Method of making a disposable cassette with negative head height Method of making a disposable cassette with negative head height

1996-09-10

2000-08-29

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Radio frequency

1562744, 1562751, B29C 6504

Patent

active

061104108

ABSTRACT:
A method of radio frequency (RF) welding of a flexible PVC sheet to a rigid copolyester carrier by holding a flexible PVC sheet and a rigid copolymer carrier together between heated RF dies. A predetermined temperature differential is maintained between the RF dies, with the flexible sheet side at a higher temperature than the rigid carrier side and adjusted so that a weld plane is established along the interface between the PVC and the copolyester. An RF weld signal is passed through the first and second RF dies and the PVC and copolyester therebetween, so that the flexible PVC sheet and the copolyester rigid carrier partially melt and become welded together at the weld plane.

REFERENCES:
patent: 2747646 (1956-05-01), Lippman
patent: 3655477 (1972-04-01), Scholl et al.
patent: 4236880 (1980-12-01), Archibald
patent: 4657609 (1987-04-01), Hensler

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