Duct forming machine

Details Duct forming machine Duct forming machine

1975-10-30

1978-01-31

Bilinsky, Z. R.

53137, 93 56PD, B31B 360, B31F 100

Patent

active

040709540

ABSTRACT:
A machine for fastening the flap of a duct board previously cut in a manner to permit it to be folded into duct form; such machine being capable of stapling the flap to the side edge of the board if desired and of applying a sealing tape to the flap and adjacent other edge of the duct board to complete the forming and sealing of a piece of duct board into a duct.

REFERENCES:
patent: 929450 (1909-07-01), Langston
patent: 1417651 (1922-05-01), Woehr
patent: 3199262 (1965-08-01), Miller et al.
patent: 3800679 (1974-04-01), Bartelheimer
patent: 3908526 (1975-09-01), Vassalos

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