Punching and perforating unit with combined punching and perfora

Details Punching and perforating unit with combined punching and perfora Punching and perforating unit with combined punching and perfora

1992-07-21

1994-03-15

Jones, Eugenia

Cutting

Cutting motion of tool has component in direction of moving...

Orbital motion of cutting blade

83346, 83667, 83670, 83678, B26D 162, B26F 100

Patent

active

052937992

ABSTRACT:
A punching and perforating cylinder and a die and anvil cylinder are part of a computer paper processing system producing the line holes and the cross perforation in a continuous paper web. The PUNCH/PERF cylinder is mounted on an upper shaft, while the DIE/ANVIL cylinder is mounted on a lower shaft. The upper and lower shafts are rotatably engaged by a set of gears. At both ends of the PUNCH/PERF cylinder, holes are located to accept the PUNCHES. At both ends of the DIE/ANVIL cylinder, holes are located to accept the DIES. While the two cylinders are rolling together, the punches engage with the dies and form the punched line holes in the continuous paper web. The PUNCH/PERF cylinder has longitudinally formed slots, providing the space for the cross perforating blades and for the cross perforating blade clamping bars. The DIE/ANVIL cylinder has longitudinally formed slots, providing the space for the hardened anvil bars. While the two cylinders are rolling, the cross perforating blades are engaged with the anvil bars and form the cross perforation in the continuous paper web. At both ends of the cross perforating blade locking bars, holes are located to accept the punches, providing the punch hole locations in the cylinder, circumferentially. At both ends of the anvil bars, holes are located to accept the dies, providing the die hole locations in the cylinder, circumferentially. The combined punching and perforating cylinder set enables it to complete both the punching and perforating operations in a continuous paper web by only one set of rotating cylinders.

REFERENCES:
patent: 2735488 (1956-02-01), Anderson et al.
patent: 3706250 (1972-12-01), Herd
patent: 3954034 (1976-05-01), Broderick
patent: 4074599 (1978-02-01), Allen
patent: 4594926 (1986-06-01), Propheter
patent: 5133235 (1992-07-01), De Vito

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