# US 5,704,533 A · Lever actuated stapler

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- Number: US 5,704,533 A
- Document ID: US5704533A
- Status: Granted
- Kind: A
- Application number: 08/805,927
- Filed: 1997-02-25
- Granted: 1998-01-06
- Earliest claimed: 1997-02-25
- Inventors: Chun Yuan Chang
- Web page: https://patentgrep.com/patent/US5704533A

## CPC

- B25C 5/0285: {Hand-held stapling tools, e.g. manually operated, i.e. not resting on a working surface during operation}
- B25C 5/0292: {with the objects to be stapled together introduced perpendicularly to the longitudinal axis of the tool in an opening formed by an anvil and a plunger}
- B25C: HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS (for shoemaking A43D)

## Abstract

A stapler includes a base and a chute and a cover pivotally coupled together at a rear pivot shaft. The base includes a roller extended downward beyond the middle portion. A lever includes a front portion pivotally coupled to the front portion of the cover and includes a rear handle for operating the lever, and including a block formed in the middle portion for engaging with the roller and for forcing the base toward the chute and the cover. The block includes a tapered surface for engaging with the roller and for allowing the user to operate the lever with less force.

## Claims

### Claim 1

A stapler comprising:
a base and a chute and a cover pivotally coupled together at a rear end with a pivot shaft, said cover including a front portion, said base including an inclined rear bottom and including a middle portion having a roller extended beyond said base, and
a lever including a front portion pivotally coupled to said front portion of said cover at a pivot pin and including a rear portion having a handle for operating said lever, and including a middle portion having a block for engaging with said roller and for forcing said base toward said chute and said cover, said block including a tapered surface for engaging with said roller and for facilitating an operation of said lever.