GB2316039A

GB2316039A - A cap for a clutch-type pencil having a sharpener

Info

Publication number: GB2316039A
Application number: GB9616581A
Authority: GB
Inventors: Ming Tang Hung; Plato Chen
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-07
Filing date: 1996-08-07
Publication date: 1998-02-18
Anticipated expiration: 2016-08-07
Also published as: GB9616581D0; GB2316039B; DE29614202U1

Abstract

The cap 1 for the pencil 4 has a cavity 21 which mounts an angled cutting blade 3. The pencil lead 41 is sharpened by inserting the lead into the cavity via an opening 111 followed by rotation of the cap. Debris is discharged either via an opening in the side of the cap or retained within the cavity. The cap may be formed in two parts 1,2.

Description

TITLE: A CAP SHARPENER FOR CLUTCH-TYPE PENCIL BACKGROUND OF THE INVENTION The present invention relates to a cap sharpener for clutch-type pencil, and more particularly to a pencil lead sharpener that attaches to the top of clutch-type pencil cap for the convenience of sharpening. pencils.

In drawinq and writing, a- conventional clutch-type pencil with a coarse lead refill lead (about 2 mm) has been used by most people. For the convenience of writing, a lead sharpener is designed to be attached to the clutch-type pencil which is a tubular seat having a tapered thimble at one end, and a V-shaped tool bit holder extending from the tip of the tapered thimble for holding a V-shaped metallic blade therein. The other end.

of the tubular seat has an eraser. In normal state, the sharpener end -of the tubular seat sleeves onto the pencil body, while the eraser end exposes to the opposite end. When it is necessary to sharpen the lead pull the tubular seat away from the pencil body, 20 insert the lead into the tapered thimble and turn the lead clockwise which causes the V-haped blade to shape the lead- . This conventional sharpener possesses shortcomings which are as follows: 1. when the lead is inserted into the top of the tapered thimble engaging with the V-shaped blade and turned with the pencil body, the pivot of the lead must be kept in one line, if not the fragile refill lead is easy to be broken up.

2. This lead sharpener has only one opening, the opening of the tapered thimble, wherein the the lead powder cut down is easy to lay up and difficult to clean.

There is another cooperative cap sharpener in the conventional lead sharpeners, which has an ordinary pencil cap at one end, and a cuboid vane seat with a blade at the other end for pencil sharpening. But this conventional cuboid sharpener is used mainly for the traditional pencil and not for the clutch-type pencil.

SUMMARY OF THE INVENTION A main object of the present invention is-to provide a cap sharpener for clutch-type pencil which integrates a sharpener with a pencil cap so-that the cap can hold the pencil in a constant pivot as the lead is cut by the sharpener structure, and the chip powder cutting down from the lead can be displaced.

The present invention includes- -a- cap with a through-hole in the center of thd top portion a blind end- for extending therethrqugh a refill lead, a vane set next to the top portion of the through-hole of the blind end on a slant a-long- -the axle lead of the hole. in. the cap, the upper inner portion of the cap holding own a blade and displacing the lead chip powder with an open gate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic draw of the present invention; FIG. 2 is a side view showing the lead action of the present invention; FIG. 3 is an exploded view of a cap of a second embodiment; and FIG. 4 is a side view showing the-cap capped.on the rear end of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring to Fig. 1, an operation of the present invention comprises a cap 1, a cylinder 2 at the upper portion thereof, a blade 3 at one side of the cylinder 2, and a pencil shaft 4 having a lead end 41 capped by the cap 1 and a push button- 42- at the opposite end thereof; The cap 1 has a blind end 11 at inner portion closing to the cylinder 2, a through-hole 111 at the center portion of the blind hole 11 interconnecting the-.cylinder 2 and the blind hdle 11, two.resilient trips 12 extending opposingly from the lower inner wall, and two granular projections 121 being formed on the top portions of the resilient trips 12, respectively. The cylinder 2 has an open gate 21 on one side corresponding to the blade 3 and an open end 22 at the lower end.having- joining a female step joining face 221 at the inner edge-thereof.

The blade 3 is secured in the open end 22 of the cylinder 2 slantly.

In.practiciWng, referring to-Fig. 2, the cap 1 is sleeved .on -the the pencil shaft 4 with the refill lead 41 passing through the through-hole 111 of the blind end 11 and reaching the cutting edge of the blade 3 in the inner of the cylinder 2. When turning the cap 1 and the pencil shaft 4 towards opposite directions, due to the design.of the cap 1, the pencil shaft 4 can be hold still during the rotation, which allows the tip of the refill lead 41 to be sharpened, and the lead chip powder is displayed out from the open gate 21, instantly.

Referring to Fig. 3 which illustrates another embodiment of the present invention, in which the cap 1 and the cylinder 2 are separated. The cylinder 2 has secured the blade 3 therein and is connected to the blind end 11 by mean of joining a female step joining face 221 on. the open end 22 to a male step joining face 112. The cylinder 2 includes a hollow space which is adapted- to collect the lead chip powder.

Furthermore, when the sharpener installed in the cap 1 of the present invention is not in use, the cap 1 may be capped on the push button 42 at the other end with- the two granular projections 121 extending into the grasping the push button 42, as shown- in Fig. 4, which prevents the cap from sliding out, accidentally.

Claims

I CLAIM:

1. A cap sharpener for clutch-type pencil being designd to form a lead sharpener with a pencil cap integrally, and the improvements comprising: said cap having a blind end at top portion and a cylinder on top of said blind end, said blind end having a through-hole corresponding to said cylinder, at least one resilient trip on the inner wall thereof and a granular projection extending inwardly- from said resilient trip; said cylinder comprising a blade being held in a slanting-.angle with respect to the axle of said cap; wherein said through-hole of said.blind- end permits the lead extending therethrough to reach said blade in said cylinder.

2. A cap sharpener for clutch-type pencil, as recited in claim 1, wherein, said cylinder has an open -gate corresponding to said blade for -displacing out chip powder.

3. A clutch-type pencil according to Claim 1 wherein said cylinder is separable from the rest of the cap and is connected to said blind end by means of a projection engaging in a rebate.

3. A cap sharpener for clutch-type pencil, as recited in claim 1, wherein, said cylinder is separated from said cap, and holds said blade slantly in a hollow body, and- is connected to said blind end by mean of a female and a male joining faces; said hollow space of said cylinder is used to collect the lead chip powder.

Amendments to the claims have been filed as follows CLAIMS 1. A clutch-type pencil having a body with a lead holder at one end and an operating button at the opposite end, and a cap, the cap having a cylinder, a blind end between the cylinder and the open end of the cap, said blind end having a through-hole, said cylinder housing a blade held at a slanting angle with respect to the axis of said cap, whereby the through-hole permits a lead extending therethrough to reach the blade when the cap is mounted over a lead held in said one end of the pencil body, the cap being engagable on the opposite end of the pencil body; at least one resilient tab defined by the cap wall and having a projection extending inwardly from the tab and engagable with the operating button to hold the cap on the body.

2. A clutch-type pencil according to Claim 1, wherein said cylinder has an aperture adjacent the blade for displacing lead shavings from said cylinder.