Production of jackets for flexible magnetic disks, and apparatus

Details Production of jackets for flexible magnetic disks, and apparatus Production of jackets for flexible magnetic disks, and apparatus

1986-06-12

1988-03-29

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Assembling or joining

29700, 29791, 1564771, 219 87, 219538, 264248, 4251744, B21D 3903, B23P 1900

Patent

active

047334525

ABSTRACT:
The jacket blanks punched out from a film web are folded to give jackets and then closed by spot welding with the aid of a wavy resistance belt, the welding temperature being produced for a short time by means of a current pulse in the resistance belt.

REFERENCES:
patent: 3265551 (1966-08-01), Ananian et al.
patent: 4038693 (1977-07-01), Huffine
patent: 4490765 (1984-12-01), Nakamats
patent: 4573572 (1986-03-01), Kato et al.
patent: 4617081 (1986-10-01), Bleau et al.

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