US2575772A - Rubber stamp - Google Patents

Description

NOV. 20, 1951 SCHENKER 2,575,772

RUBBER STAMP Filed July 28, 1949 INVENTOR. EUGENE SCHENKER ATTY Patented Nov. 20,1951

UNITED sT T s PATENT OFFICE RUBBER STAMP Eugene Schenker, Orlando, Fla.

Application July 28, 1949, Serial No. 107,179

1 Claim.

This invention relates to an improvement in rubber stamps and particularly to means for framing a die and fastening the frame to the working surface of a conventional rubber cushioned stamp block, whereby, the die is placed in working relation with the block without the use of adhesive.

In the ordinary cushioned stamps the die is engaged with the sponge rubber cushion of the block by an adhesive, however this form of engagement is not satisfactory where a stamp receives hard usage, or where a stamp is overinked as chemicals in the ink loosen the adhesive. I am aware that an effort has been made to cure this objection by means of a die having extended end portions lapped from the stamp working surface over the ends of the stamp block and being fastened to said ends. In this structure it has been determined that the rubber die breaks at the vertex of the working surface and ends, also there is a lateral movement of the die causing blurred printing, therefore, the principal object of this invention is to provide means for securing the die in working relation with the cushioned block whereby these objectional features will be eliminated.

Other objects of this invention will become apparent as the detailed description thereof proceeds.

This invention resides substantially in the combination, arrangement and relative location of parts, all in accordance with the disclosure herein.

In the accompanying drawings,

Figure l is an exploded view of a cushioned rubber stamp embodying this invention.

Figure 2 is a side edge elevation of a die frame, forming a part of this invention, illustrating a rubber die framed thereby and ready for working engagement with the stamp block.

Figure 3 is a longitudinal section of a rubber stamp embodying the present invention.

Now referring more particularly to the drawings 2 indicates a conventional stamp wood block of the type having a sponge rubber cushion 3 and suitable engaged handle 4 and while said block is shown of rectangular shape this is not a limitation as same may be square, round, triangular, et cetera.

Formed in suitable size and shape to fit said block is a die frame member 5 having right angular portions 6 for fitting the frame to the ends of said block and having apertures l for tack, screw, or the like fastening of the frame to the block, said frame having a base opening 8 of suitable size and shape to snugly bound the die printing strip 9, which may have one or a series of printing portions, of stamp die I0, which protrudes thru opening 8, thus preventing lateral or longitudinal movement of the die.

Die l0 has a flange ll circumscribing printing strip 9 which, when die is placed in the frame, is laid to framing ledge portions [2 thereby supporting the die in said frame.

It is desired to provide a simple and durable stamp and therefore the frame, tacks, screws, or the like will preferably be of aluminum as ink is less apt to corrode this metal.

From this description it is believed clear that in assembly the die 10 is fitted in the frame 5 after which said frame is engaged to the stamp block in a manner whereby the inner face of the die I 4 is juxtaposed to working face of block cushion 3, Figure 3.

From the above description it will be apparent to those skilled in the art that the details of construction may readily be varied without departure from the novel subject matter herein disclosed. I do not therefore desire to be strictly limited by the disclosure but rather by the claim granted me.

What is claimed:

A rubber hand stamp comprising a rectangular block having corners and a handle thereon, a die frame having a rectangular opening in the central portion thereof, said frame having right angular portions and corners formed at the junction of said portions and the central portion of said frame, said portions being adapted to lie closely against the end faces of the block, said last named corners closely engaging the corners of said block, said die frame central portion including framing ledge portions, a die having a flange closely underlying said die frame ledge portions and extending to said right angular portions and having corners closely engaging the corners of said frame, a sponge rubber cushion located between said block and said die, said cushion extending to said right angular portions and being of the same width and length as said die, a printing strip having a plurality of separated printing characters, said characters being raised and extending beyond the central portion of said frame, said strip being mounted on said die, said printing strip being entirely surrounded by said die flange and said framing edge portions of said die frame, and a plurality of tack openings in each of said right angular portions, said die and the flange each being provided with four corners for engagement with said die frame opening corners and the said corners of said angular portions respectively, whereby the corners of said die and the corners of said die flange, by engagement of the corners of the die frame opening with the corners of the angular portions thereof, prevent rotation between the die and the die frame, and whereby the engagement of the corners of the angular portions of the die frame with the corners of the rectangular, block prevent rotation between the die frame and block, the engagement of the corners of the rubber cushions. and the corners of the angular portion of the die frame preventing rotation of 4 the said sponge rubber cushion with relation to said frame and said block.

EUGENE SCHENKER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 10 Number Name Date 465,754 Clarkson Dec. 22, 1891 729,699 Test June 2, 1903 2,201,302 Rowe May 21, 1940 2,335, ,992 Biskind Dec. 7, 1943

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