Electric punch

Details Electric punch Electric punch

2005-10-18

2005-10-18

Shoap, Allan N. (Department: 3724)

Cutting

Means to drive or to guide tool

Plural tools selectively engageable with single drive

C083S618000, C083S628000, C083S691000

Reexamination Certificate

active

06955109

ABSTRACT:
An electric punch includes a plurality of pushing units mounted to the shaft which is driven by a motor. Each pushing unit includes a ring rotatably received in a pushing member and each ring has an eccentric polygonal hole through which the shaft fixedly extends. The pushing members are received in movable frames and two opposite sides of each pushing member are slidably in contact with two upright walls of the movable frame corresponding thereto. A plurality of punch units each include a punch frame and a punch member whose front end is used to punch sheets and rear end of the punch member extends out from the punch frame and is in contact with the pushing member. The pushing member is moved up and down in the movable frame by the rotation of the rings when the shaft rotates and the movable frames move to push the punch members to punch the sheets.

REFERENCES:
patent: 2327646 (1943-08-01), Hutchinson
patent: 5628502 (1997-05-01), Amarakoon
patent: 6269721 (2001-08-01), Tseng
patent: 6374715 (2002-04-01), Takatsuka
patent: 2002/0139232 (2002-10-01), Hsu
patent: 2003/0150315 (2003-08-01), Lin
patent: 2003/0160094 (2003-08-01), Ko

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