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Top loading staple cassette

Imported: 24 Feb '17 | Published: 06 Jan '04

Ying-Chou Lee

USPTO - Utility Patents

Abstract

A staple cassette for a stapler includes a base member having two side walls and a pushing member are movably mounted onto the two side walls of the base member. A first hook extends from an underside of the base member and located close to a first end of the base member, and an opening is defined through the underside of the base member and located close to a second end of the base member. The pushing member has a second hook extending from an underside there. A spring has a first end hooked to the first hook on the base member and a second end of the spring extends through the opening and engaged with the second hook. A cover is mounted to the base member and includes an opening defined through the top of the cover. A top piece is slidably engaged with the opening of the cover.

Description

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view to show a conventional staple cassette;

FIG. 2 is a cross sectional view to show conventional staple cassette;

FIG. 3 is an exploded view to show the staple cassette with the top piece removed from the cover;

FIG. 4 is an exploded view to show the staple cassette of the present invention;

FIG. 5 is a perspective view, partly removed, of the staple cassette of the present invention;

FIGS. 6 and 7 show the top piece is slidably engaged with the top opening of the cover, and

FIG. 8 shows staples in the base member are urged by the pushing member.

Claims

1. A staple cassette comprising:

2. The cassette as claimed in claim 1, wherein two grooves are defined in the two sides of the base member and the pushing member has two ridges which are engaged with the two grooves.

3. The cassette as claimed in claim 1, wherein the cover has a plurality of stops and an elongate protrusion extending from two insides of the two side walls of the cover, intervals defined between the stops and a gap defined between the stops and the elongate protrusion, the top piece having blocks extending from two sides thereof so that the blocks are inserted in the intervals and slid into the gap.

4. The cassette as claimed in claim 1, wherein a hole is defined through the underside of the base member and a first engaging member is located beside the hole, a bottom plate engaged with the receiving space and having a second engaging member on a first end thereof, the second engaging member engaged with the first engaging member, a first end of the bottom plate having an insertion extending therefrom, the base member having a recess defined in an inside of the second end thereof and the insertion of the bottom plate engaged with the recess.

5. The cassette as claimed in claim 1, wherein the base member has a plurality of engaging lugs on the two sides thereof and the cover has a plurality of slots defined through the two side walls thereof, the engaging lugs engaged with the slots.