Patent US1166629A successfully refreshed from Google Patents.
Patent US3853027A successfully refreshed from Google Patents.
US3853027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting resilient porous material
Assignee: Foerenade Fabriksverken AB
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Filing: 1973-05-25
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Granted: 1974-12-10
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Expires: 1993-05-25
Abstract
Abstract Apparatus for cutting or slitting a resilient porous material such as foamed polyurethane which employs a material support carriage movable to feed the material against a reciprocating cutting knife in a manner to slit the material from one edge surface without cutting the material along the side edges peripherally of the intended slit.
Inventors
- 👤 R Karlstrom
- 👤 L Jansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:40
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/006; A; A41; A41D; A41D19/00; A41D19/02; B26D1/00; B26D1/01; B26D1/04; B26D1/06; B26D1/10; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/953; Y10T; Y10T83/00; Y10T83/02; Y10T83/0267; Y10T83/647; Y10T83/654; Y10T83/869; Y10T83/8821; Y10T83/8841; Y10T83/8843; Y10T83/8878; Y10T83/8881
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
213 words
Apparatus for cutting a slit in a workpiece of resilient porous material to form a glove-like cover having upper and lower surfaces between which the slit is to be made, said apparatus comprising, in combination, a base plate, track means supported by said base plate, workpiece support means supported by said track means and including a carriage having means thereon to fixedly retain a workpiece of resilient porous material thereon preparatory to cutting a slit in an edge surface thereof, a generally flat cutting knife supported by said base plate, and means for longitudinally reciprocating said cutting knife, said track means and said carriage being cooperable so that said carriage is movable in a direction generally parallel to the longitudinal axis of said cutting knife to effect engagement of said reciprocating cutting knife with said edge surface of said workpiece when supported on said carriage such that a slit is cut in said workpiece intermediate the upper and lower surfaces thereof with the workpiece remaining integral along the peripheral portion of said slit opposite said edge surface, said cutting knife having a cutting edge of sufficient size to cut the desired slit in the resilient porous workpiece when said carriage is moved in said longitudinal direction of said cutting knife a predetermined distance.
Claim 2
Dependent Claim
213 words
Apparatus for cutting a slit in a workpiece of resilient porous material to form a glove-like cover having upper and lower surfaces between which the slit is to be made, said apparatus comprising, in combination, a base plate, track means supported by said base plate, workpiece support means supported by said track means and including a carriage having means thereon to fixedly retain a workpiece of resilient porous material thereon preparatory to cutting a slit in an edge surface thereof, a generally flat cutting knife supported by said base plate, and means for longitudinally reciprocating said cutting knife, said track means and said carriage being cooperable so that said carriage is movable in a direction generally parallel to the longitudinal axis of said cutting knife to effect engagement of said reciprocating cutting knife with said edge surface of said workpiece when supported on said carriage such that a slit is cut in said workpiece intermediate the upper and lower surfaces thereof with the workpiece remaining integral along the peripheral portion of said slit opposite said edge surface, said cutting knife having a cutting edge of sufficient size to cut the desired slit in the resilient porous workpiece when said carriage is moved in said longitudinal direction of said cutting knife a predetermined distance.
Claim 3
Dependent Claim
178 words
Apparatus for cutting a slit in a workpiece of resilient porous material to form a glove-like cover having upper and lower surfaces between which the slit is to be made, said apparatus comprising, in combination, a base plate, track means supported by said base plate, workpiece support means supported by said track means and adapted to fixedly retain a workpiece of resilient porous material thereon preparatory to cutting a slit in an edge surface thereof, a generally flat cutting knife supported by said base plate, upper and lower cover plates disposed on opposite surfaces of said flat cutting knife and providing guide means for said cutting knife, and means for reciprocating said cutting knife relative to said cover plates, said workpiece support means being movable to effect engagement of said reciprocating cutting knife with said edge surface of said workpiece when supported on said support means such that a slit is cut in said workpiece intermediate the upper and lower surfaces thereof with the workpiece remaining integral along the peripheral portion of said slit opposite said edge surface.
Claim 4
Dependent Claim
178 words
Apparatus for cutting a slit in a workpiece of resilient porous material to form a glove-like cover having upper and lower surfaces between which the slit is to be made, said apparatus comprising, in combination, a base plate, track means supported by said base plate, workpiece support means supported by said track means and adapted to fixedly retain a workpiece of resilient porous material thereon preparatory to cutting a slit in an edge surface thereof, a generally flat cutting knife supported by said base plate, upper and lower cover plates disposed on opposite surfaces of said flat cutting knife and providing guide means for said cutting knife, and means for reciprocating said cutting knife relative to said cover plates, said workpiece support means being movable to effect engagement of said reciprocating cutting knife with said edge surface of said workpiece when supported on said support means such that a slit is cut in said workpiece intermediate the upper and lower surfaces thereof with the workpiece remaining integral along the peripheral portion of said slit opposite said edge surface.
Claim 5
Dependent Claim
55 words
Apparatus as defined in claim 2 wherein said upper and lower cover plates are coated with a material having a low coefficient of friction so as to minimize frictional drag between said cover plates and said knife blade and between said cover plates and said resilient porous material workpiece as a slit is cut therein.
Claim 6
Dependent Claim
68 words
Apparatus as defined in claim 2 wherein said knife blade and said cover plates have substantially identical plan configurations such that said knife blade may be substantially completely covered by said cover plates, and wherein said means for effecting reciprocating movement of said Cutting knife includes means for effecting movement of said knife blade outwardly from the edges of said cover plates a maximum distance of 5 millimeters.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |