Cutting – Processes – During movement of work past flying cutter
Patent
1995-10-20
1997-10-07
Rada, Rinaldi I.
Cutting
Processes
During movement of work past flying cutter
83100, 83338, 83352, 833562, B26F 108
Patent
active
056736029
ABSTRACT:
A perforator has a rotary drum. A plurality of die sets are arranged at regular intervals around a peripheral surface of the drum and circulates along with the peripheral surface. Each of the die sets has a pair of die and punch. The die is secured to a die holder which is mounted to the peripheral surface, and the punch is secured to a punch holder which is linearly movable in a direction perpendicular to the peripheral surface between a punch position where the punch is fitted in the die and a retracted position where the punch is retracted away from the die. The sheet material is brought into contact with the peripheral surface within a predetermined range, and conveyed on the peripheral surface in the same direction at the same speed as the die sets. An annular punch drive cam disposed surrounding the peripheral surface drives the punch holder to move between the punch position and the retracted position. The punch or the sheet material is shifted into a relief position where the punch cannot interfere with the sheet material beyond the predetermined contact range of the sheet material with the peripheral surface.
REFERENCES:
patent: 1559987 (1925-11-01), Reinhardt
patent: 2619177 (1952-11-01), Praturlon
patent: 3126779 (1964-03-01), Welch et al.
patent: 3661044 (1972-05-01), Duden et al.
patent: 3894458 (1975-07-01), Borello
patent: 3943810 (1976-03-01), Muylle
patent: 4134319 (1979-01-01), Clark
patent: 4747895 (1988-05-01), Wallerstein et al.
patent: 5317942 (1994-06-01), Nakajima
Seikai Hiroshi
Suzuki Mituru
Takahashi Koichi
Tsuzaki Hiroshi
Dexter Clark F.
Fuji Photo Film Co. , Ltd.
Rada Rinaldi I.
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