Perforating apparatus with fine setting

Cutting – Means to drive or to guide tool – Means to change datum plane of tool or tool presser stroke

Reexamination Certificate

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Details

C083S487000, C083S490000, C083S508200, C083S639100, C083S660000

Reexamination Certificate

active

07028597

ABSTRACT:
In a perforating apparatus which has a holder to which a perforating blade can be fastened, the perforation is produced via the movement of a piston by the piston pressing against an air cushion, which in turn transmits this pressure to a perforating piston which presses the perforating blade downward. A positioning device which directly varies the position of the piston unit relative to the housing surface is provided for the zero setting of the piston.

REFERENCES:
patent: 3182535 (1965-05-01), Quakenbush
patent: 3380330 (1968-04-01), Gilmore
patent: 3718064 (1973-02-01), Abarotin et al.
patent: 3892156 (1975-07-01), Johnstone
patent: 4210052 (1980-07-01), Fisher
patent: 4226153 (1980-10-01), Insolio
patent: 4228711 (1980-10-01), Insolio
patent: 4392404 (1983-07-01), Schwarzenberg et al.
patent: 5247865 (1993-09-01), Kroger et al.
patent: 2333662 (1975-01-01), None
patent: 2451491 (1975-08-01), None
patent: 3439199 (1986-01-01), None
patent: 3819264 (1988-12-01), None
patent: G8909371.2 (1989-11-01), None
patent: 29712149 (1998-11-01), None
patent: 0 562 454 (1993-09-01), None
patent: 99/02315 (1999-01-01), None
The American College Heritage Dictionary, 1982, Houghton Mifflin Company, Second College Edition, p. 782.

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