Punch with punch elements in adjustable positions

Details Punch with punch elements in adjustable positions Punch with punch elements in adjustable positions

2003-02-24

2004-09-07

Shoap, Allan N. (Department: 3724)

Selective cutting (e.g., punching)

With specific means to select a plurality of tools

Coded interposer

C083S549000, C083S687000, C083S691000

Reexamination Certificate

active

06786395

ABSTRACT:

BACKGROUND OF INVENTION
1. Field of Invention
The present invention relates to a punch with punch elements in adjustable positions.
2. Related Prior Art
Taiwanese Patent Publication No. 241615 discloses a conventional punch including a base
3
, a frame
2
, a lever
1
and three punch units
4
. The base
3
defines five holes
32
. The frame
2
is mounted on the base
3
. The frame
2
includes an upper portion and a lower portion. The lower portion of the frame
2
defines five holes
22
each communicated with one of the holes
32
. The upper portion of the frame
2
defines five holes
22
each communicated with one of the holes
32
. The punch units
4
are for insertion through three of the holes
22
and three of the holes
32
. Each of the punch units
4
includes a sleeve
45
, a spring
43
and a punch pin
41
. The sleeve
45
includes a lower end fit in one of the holes
22
defined in the lower portion of the frame
2
and an upper end fit in one of the holes
22
defined in the upper portion of the frame
2
. The spring
43
is mounted on upper portion of the frame
2
near the sleeve
45
. The punch pin
41
includes a sharp lower end
410
for insertion through one of the holes
32
, a body
412
inserted in the sleeve
45
and an enlarged upper end
411
in contact with the lever
1
. The lever
1
is pivotally mounted on the base
3
for pushing the punch pins
41
. Although it is designed that each of the punch units
4
can be moved from one of the holes
32
to another one of the holes
32
, it is troublesome. Moreover, paper may be contaminated or even damaged during such movement.
Taiwanese Patent Publication No. 257138 discloses a conventional punch including a base
30
, a lever
40
and three punch units
10
. The base
30
includes a back bar
312
in which a plurality of holes
311
is defined and two lateral plates
33
. Each of the punch units
10
includes a casing
11
defining a rear hole
19
and two lateral holes
121
. A square shaft
21
is inserted in the lateral holes
121
. The lever
40
includes two lateral members
42
connected with the square shaft
21
and a cross member
41
connected between the lateral members
42
. A screw is inserted through one of the holes
311
into the rear hole
19
defined in one of the casings
11
.
The present invention is therefore intended to obviate or at least alleviate the problems encountered in the prior art.
SUMMARY OF INVENTION
It is the primary objective of the present invention to provide a punch that can be adjusted easily in order to punch various combinations of holes.
According to the present invention, a punch includes a base, a plurality of punch pins, a lever and a plank. The base includes a lower member defining a plurality of holes and an upper member defining a plurality of holes corresponding to the holes defined in the lower member. Each of the punch pins is for insertion through one of the holes defined in the upper member and one of the holes defined in the lower member. The lever is pivotally mounted on the base. The plank defines a plurality of holes. The plank is movably attached to the lever between several positions in each of which it pushes a different set of the punch pins when the lever is operated.
Other objectives advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the attached drawings.


REFERENCES:
patent: 3073199 (1963-01-01), Yerkes
patent: 3392913 (1968-07-01), Neilsen
patent: 3474694 (1969-10-01), Neustadter et al.
patent: 3733466 (1973-05-01), Krumrey
patent: 4480782 (1984-11-01), Morishima
patent: 4688457 (1987-08-01), Neilsen et al.
patent: 4713995 (1987-12-01), Davi
patent: 5143502 (1992-09-01), Kaufmann et al.
patent: 5582067 (1996-12-01), Snider
patent: 5632188 (1997-05-01), Karlis
patent: 6032566 (2000-03-01), Evans et al.
patent: 6109155 (2000-08-01), Huang
patent: 6223636 (2001-05-01), LaPlante et al.
patent: 6239573 (2001-05-01), Schmall
patent: 6439093 (2002-08-01), Davies
patent: 6565496 (2003-05-01), LaPlante et al.
patent: 6622908 (2003-09-01), Fukumoto et al.
patent: 6644161 (2003-11-01), Lin
patent: 563718 (1932-11-01), None

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