Patent US3961551A successfully refreshed from Google Patents.
US3961551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-operated device for slitting fabric into strips
Assignee: Individual
•
Filing: 1975-08-22
•
Granted: 1976-06-08
•
Expires: 1995-08-22
Abstract
Abstract Disclosed is a hand-operated device for slitting fabric drawn therethrough into strips. The device has a V-shaped bracket which is secured over the edge of a table top by a wedge, without using any tools. Fabric is drawn by hand from the edge toward the interior of the table top between a row of blades extending upwardly from the device and a guard bar disposed over the blades. The device can be disassembled, without using any tools, to reposition the blades so as to cut strips of different widths or to replace blades. Except for the blades, the device is entirely formed of an inexpensive plastic material formed by a process such as molding.
Inventors
- 👤 John S. Doyel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:59
CPC Classifications
D; D06; D06H; D06H7/00; D06H7/04; Y; Y10; Y10S; Y10S83/00; Y10S83/01; Y10T; Y10T83/00; Y10T83/869; Y10T83/872; Y10T83/8722; Y10T83/889; Y10T83/929; Y10T83/9457; Y10T83/9493; Y10T83/9498
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
303 words
A hand-operated device for slitting fabric drawn therethrough into springs comprising: a bracket formed of a top leg and a bottom leg joined at their back end and extending divergently forwardly therefrom to form therebetween a generally V-shaped notch; a blade unit secured to the bracket, said blade unit comprising a generally convex, hollow blade support cover and a generally convex blade support removably nesting in the cover, said cover having a top wall formed with a laterally extending row of elongated slots each extending forwardly, and said support having means for holding a laterally extending row of blades each extending forwardly and protruding upwardly through a corresponding one of said slots in the cover, the protruding portion of each blade having a sharpened edge sloping upwardly in extending from the back toward the front of the bracket; a guard bar extending laterally over the protruding portions of the blades and spaced upwardly therefrom; and a wedge having two opposite walls converging towards a sharp end at an angle matching that of the V-shaped notch formed by the bracket; said device engaging a table top by moving the bracket from the edge toward the interior of the table top, with the top bracket leg over the top surface of the table top and with the bottom leg under the underside of the table top, and pressing the inner side of one leg flat against the table top by inserting the sharp end of the wedge between the other leg and the table top and forcing the wedge toward the back of the bracket, said device slitting fabric into strips by drawing the fabric forwardly between the top surface of the blade support cover and the facing surface of the guard bar while pressing the fabric downwardly over the sharpened edges of the blades.
Claim 2
Dependent Claim
303 words
A hand-operated device for slitting fabric drawn therethrough into springs comprising: a bracket formed of a top leg and a bottom leg joined at their back end and extending divergently forwardly therefrom to form therebetween a generally V-shaped notch; a blade unit secured to the bracket, said blade unit comprising a generally convex, hollow blade support cover and a generally convex blade support removably nesting in the cover, said cover having a top wall formed with a laterally extending row of elongated slots each extending forwardly, and said support having means for holding a laterally extending row of blades each extending forwardly and protruding upwardly through a corresponding one of said slots in the cover, the protruding portion of each blade having a sharpened edge sloping upwardly in extending from the back toward the front of the bracket; a guard bar extending laterally over the protruding portions of the blades and spaced upwardly therefrom; and a wedge having two opposite walls converging towards a sharp end at an angle matching that of the V-shaped notch formed by the bracket; said device engaging a table top by moving the bracket from the edge toward the interior of the table top, with the top bracket leg over the top surface of the table top and with the bottom leg under the underside of the table top, and pressing the inner side of one leg flat against the table top by inserting the sharp end of the wedge between the other leg and the table top and forcing the wedge toward the back of the bracket, said device slitting fabric into strips by drawing the fabric forwardly between the top surface of the blade support cover and the facing surface of the guard bar while pressing the fabric downwardly over the sharpened edges of the blades.
Claim 3
Dependent Claim
91 words
A device as in claim 1 wherein the top leg of the bracket includes a forwardly extending groove and the blade unit includes a matching, forwardly extending key slidably received in said groove, and including stop means for restricting the extent of the forward movement of the blade unit with respect to the bracket, said blade unit being removable from the bracket by sliding it backwardly and out of the groove therein and the cover being removable from the blade support nested therein to expose the means for holding the blades.
Claim 4
Dependent Claim
60 words
A device as in claim 2 wherein the means for holding the blades comprise a plurality of projections formed integrally with the blade support and extending upwardly from a top surface thereof, each blade being received frictionally in a blade slit defined by a plurality of projections which are offset from each other along the length of the blade slit.
Claim 5
Dependent Claim
61 words
A device as in claim 3 wherein the top leg of the bracket includes a sleeve disposed laterally of the leg and having an open top side, and the guard bar includes a downwardly extending arm slidably received frictionally in said sleeve, said guard bar being removable from the bracket by sliding the arm thereof upwardly and out of the sleeve.
Claim 6
Dependent Claim
28 words
A device as in claim 4 wherein each of the brackets, blade support, blade support cover, wedge, and guard bar is integrally formed of a substantially homogeneous material.
Claim 7
Dependent Claim
133 words
A device as in claim 1 wherein the blade support has a top blade supporting surface extending along a sloping plane parallel to the sharpened edges of the blade and a blade base supporting surface extending upwardly from the back end of said top blade supporting surface, and wherein the blade holding means comprise a front row of projections extending upwardly along the front of said top blade supporting surface, a back row of projections extending upwardly and forwardly of said blade base supporting surface, and at least one intermediate row of projections extending parallel to said front and back rows and intermediate thereof, said projections defining therebetween a plurality of blade slits and the projections facing the same blade slit being offset from each other along the length of the blade slit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |