US2710448A

US2710448A - Stitch cutting implement

Info

Publication number: US2710448A
Application number: US293912A
Authority: US
Inventors: Andrews Clarence Earl
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-06-17
Filing date: 1952-06-17
Publication date: 1955-06-14
Anticipated expiration: 1972-06-14

Description

June 14, 1955 c. E. ANDREWS 2,710,448

STITCH CUTTING IMPLEMENT Filed June 17, 1952 INVENTOR.

ATTORNEYS 2,710,448 Patented June 14, 1955 STITCH CUTTING IMPLEMENT Clarence Earl Andrews, Lakewood, N. Y.

Application June 17, 1952, Serial No. 293,912

Claims. (Cl. 30-162) This invention relates to an implement for opening the closure seam or stitching of a feed bag which embodies a stitching that can readily be unraveled or opened by taking hold of the ends of the two interlocked threads and pulling them apart. To do this it is necessary to expose the opposite threads to grasp and this is usually done by severing one of the threads adjacent the end of the stitching to enable the opening up of a stitch and the grasping of the two threads at the opposite sides of the bag for such separating pull in opposite directions.

The present invention has for its object to provide an implement that will facilitate the cutting of the stitching at one side of the mouth of the bag and the opening of the stitching to the grasp whereby to expedite the pulling out of the stitching and the opening of the bag of feed.

A further object of the invention is to provide an implement of this character which is practical and of simple construction and one wherein a knife element is normally concealed and protected from causing bodily injury.

The foregoing and other objects will manifest themselves as this description progresses, reference is made herein to the accompanying drawing, wherein:

Fig. 1 is a perspective view of the implement in its normally inoperative position;

Fig. 2 is a fragmentary longitudinal sectional view of the implement showing the knife element projected;

Fig. 3 is an end elevation of the cutting end of the implement; and

Figs. 4 and 5 are perspective views showing the application and use of the implement in the process of removing the bag stitching.

Referring more particularly to the drawing, the numeral 1 designates the tubular housing or case having a tapered end or nose 2 providing a point 3 for introduction beneath the thread 4 of a stitch at one side of the mouth of the bag 5. This tapered end of the implement is provided with a longitudinal slot 6 through which the cutting edge 7 of a blade element 8 is projectable by means of a stem 9 fixed to the blade element. The stem is guided in a bearing 10 fixed within the chamber 11 of the case 1. A thumb piece 12 is fixed to the inner end of the stem 9 and extends radially through a slot 13 in the case to expose the thumb piece which serves as an actuator for the cutting edge under the action of the thumb when the implement is grasped in the hand. Normally the blade element 8 is retracted within the case, as by a coil spring 14 which bears at one end upon the bearing 10, as an abutment, and has its opposite ends secured to the knife stem 9 as by means of a collar 15 suitably fixed to the stem through a pin 16.

Preferably the nose of the element is tapered on its upper side in which the slot 6 is located so that the bottom wall 17 of the nose will constitute a continuation of the casing wall to form a continuous bearing support for the cutting element 8.

In use, the nose of the implement is introduced beneath one of the stitches of the thread 4 to pry it up and thereafter, by means of the thumb piece 12, the blade element is projected through the slot 6 to sever the thread. Next the thumb pressure is then released from the cutting element for retraction onto the latter by the spring 14 and thereafter the nose of the implement is introduced beneath the next adjacent stitch to pull the severed end from its interlocked relation with the thread at the opposite side of the bag. This exposes the severed end 4 at the implement side of the bag for grasp by one hand and also loosens the companion thread at the opposite side for grasp by the other hand. The two threads are then pulled apart and disengaged to permit the bag to be opened.

The implement is of simple construction and possesses a factor of safety so that when not in use it may be readily inserted in a pocket or carried in a manner similar to a pencil. The cutting edge is concealed and protected when not in use and is quickly projected for a thread cutting operation.

The foregoing description has been given in detail without thought of limitation since the inventive principles involved are capable of assuming other physical embodiments without departing from the Spirit of the invention and the scope of the appended claims.

What is claimed is:

l. A stitch cutting element comprising a tubular case having a chamber and a tapered thread prying and supporting nose formed with a slot extending from the outer surface of the nose and through its tapered surface into the chamber, a blade element normally concealed within the case and projectable through the nose slot to sever a thread supported on the tapered surface thereof, and an actuator operatively connected to the blade element for projecting the blade element through the slot.

2. A stitch cutting element comprising a chambered case having a tapered nose for prying beneath and supporting a thread thereon, such nose being formed with a longitudinal slot that extends from the outer surface of the nose through to the chamber, and a blade element within the case chamber projectable through the nose slot to sever a thread supported thereby, and spring means yieldably holding the blade element retracted within the case chamber.

3. A stitch cutting element comprising a hollow case having a chamber and a tapered nose for prying beneath and supporting a thread thereon and formed with a slot through the nose extending lengthwise thereof and into the case chamber, and a cutting element arranged within the case and projectable through the nose slot to sever a thread supported thereover, and spring means normally holding the cutting element retracted within the case chamber, said case having an actuator part exposed through a second slot in the case for the projection of the cutting element.

4. A stitch cutting implement comprising a case having a tapered nose for prying beneath a stitch forming thread, said case having a chamber and a slot extending therefrom and opening lengthwise of and through the tapered surface of the prying nose, a cutting blade slidable within the slot and retractable therefrom back to a concealed position within the chamber, said blade having a supporting stem slidably mounted within the case, and means connected to the stern for projecting the blade through the slot.

5. A stitch cutting implement comprising a case having a tapered nose for prying beneath a stitch forming thread, said case having a chamber and a slot extending therefrom and opening lengthwise of and through the tapered surface of the prying nose, a cutting blade slidable within the slot and retractable therefrom back to a concealed position within the chamber, said blade having 3 a supporting stem slidably mounted within the case, means connected to the stern for projecting the blade through the slot, said blade having a cutting edge inclined in the general direction of the tapered surface of the nose, and spring means normally acting on the stem to yieldably hold the blade in its retracted position.

References Cited in the file of this patent UNlTED STATES PATENTS Converse July 11, 1865 Di Stefano Feb. 12, 1929 Royston Jan. 1, 1935 Brati'ud Oct. 4, 1949