US2370440A

US2370440A - Seam ripper

Info

Publication number: US2370440A
Application number: US548834A
Authority: US
Inventors: Alfred D Beavin
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-08-10
Filing date: 1944-08-10
Publication date: 1945-02-27
Anticipated expiration: 1962-02-27

Description

Feb. 27, 1945.

A. D. BEAVIN SEAM RIPPER Filed Aug. 10, 1944 ALF/V517 E .2354 w/v Patented Feb. '27, 1945 UNITED STATES PATENT OFFICE SEAM RIPPER Alfred D. Beavin, Eastport, Md.

Application August 10, 1944, Serial No. 548,834

'2 Claims.

This invention relates to a seam ripper and has for one of its objects the production of a simple and efiicient tool having a specially constructed blade which is designed to facilitate the insertion thereof into cutting engagement with the stitching thread for severing the thread and without danger of injuring the material from which the stitching is being ripped.

Another object of this invention is the production of a seam ripper having anvelongated curved hook-likeblade which is sharpened toward its end and along the concave edge of the curved blade and is flat on its bottom face, the

shank of the blade being inclined upwardly theredrawn against the stitching so as to cut the stitching without harm to the stitched material.

Other objects and advantages of the present invention will appear throughout the following specification and claims.

g In the drawing:

Figpre 1 is aperspective view of the seam ripp Figure 2 is a front view thereof;

Figure 3 is a top plan View;

Figure 4 is a transverse sectional view taken on line 44 of Figure 3;

Figure 5 is an enlarged front edge view looking at the sharpened concave edge of the cutting blade ofthe seam ripper.

By referring to the drawing, it will be seen that l0 designates the shankof the seam ripper or tool which shank is fitted into a suitably designed handle or grip l I; The shank l0 terminates in a hook-like blade l2, the outer rounded apex l3 of which is in longitudinal alignment with the outer side edge of the shank H], as will i be observed by noting the indicating dotted line A in Figure 3. The blade [2 is beveled or sharpened upon its upper face from a point near the rear convex edge I4 toward the concave cutting edge [5, as shown in detail in Figure 4. The

blade l2 alsotapers upon its upper face from the shank 10 toward the apex 13, as shown in the The blade [2 is provided with a flat under face l6 and the shank I0 extends upwardly'at an incline to this flat under face l6, as is shown in Figures 2 and 5.

Because of the fact that the apex I 3 is in line with the front side edge of the shank [0, the

operator wil1 be enabled to easily gage the location of the apex l 3 under a seam, fold or hem and the wedge shape, or longitudinal as well as transverse taper of the blade l2, and also its hook shape will facilitate the insertion of the blade into cutting engagement with the stitching thread. The flat under face [6 will slide freely upon the face of the material from which the seam, fold or hem is being ripped, and because this bottom face I6 is fiat the cutting edge I5 will not tend to cut the material but will slide over the face of the material and will cut the thread with a shearing action. The shank H) by being inclined upwardly relative to the blade 12 will permit the hand of an operator to clear the work or material and facilitate the ripping of a seam without rumpling or marring the material.

The blade I2 is preferably tempered between the points indicated by the two parallel dotted lines a::c in Figure 3. It should be understood quickly inserted into contact with a stitching thread for cutting the thread. It should also be noted that the flat face [6 provides a flat runner face for sliding the tool upon the face of material from which the seam, fold or hem is being removed.

It should be further understood that certain detail changes in the construction of the tool may be employed without departing from the spirit of the invention so long as such changes fall within the scope of the appended claims.

Having described the invention, what I claim as new is:

1. As an article of manufacture, a seam ripper comprising a cutting blade, a shank inclined at an angle upwardly relative to the longitudinal axis of said cutting blade, said cutting blade being curved laterally of the shank and wholly offset relative to said shank; said blade tapering from the shank toward the outer end of said blade, and also tapering from one side edge toward the opposite side edge to provide a cutting edge upon one side and at the end of said blade, and said blade having a flat under face.

'2. A device of the class described comprising a hook-shaped cutting blade having a convex rear edge and a concave front edge, said blade being tapered transversely from the rear toward the front edge, a shank extending upwardly at an incline relative tothe longitudinal axis of said ofl-set position relative to said shank, the flat bottom facilitating the sliding of the blade into a cutting position relative to the stitching thread holding a seam, fold, hem, and the like, and the tapered hook-shaped blade facilitating the insertion and cutting of the thread.

ALFRED D. BEAVIN.