Patent US3791246A successfully refreshed from Google Patents.
US3791246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for cutting-sheet-like material such as fabric
Assignee: Eastman Machine Co
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Filing: 1973-02-26
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Granted: 1974-02-12
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Expires: 1993-02-26
Abstract
Abstract A carriage is mounted for manual movement along a slotted track and supports the peripheral cutting edge of a rotary knife within the slot. A roller is mounted on the carriage for rotation about an axis parallel to that of the rotary knife to hold a portion of material to be cut against the track and has a peripheral groove arranged to receive a portion of the rotating cutting edge of the knife. A nip is defined at the point where the cutting edge enters the roller groove to abradingly cut material arranged in its path movement. A cantilevered throat plate is preferably mounted on the carriage and has split trails at its free end to receive the cutting edge therebetween and to smooth such held material proximate the nip. The configuration of the split trails tends to insure the rotative independence of the roller and the knife.
Inventors
- 👤 C Lazickas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:52
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/38; B26F1/3806; B26F1/3813; B26F1/3826; B26F2210/00; B26F2210/12; B26F2210/14; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/936; Y10S83/939; Y10T; Y10T83/00; Y10T83/566; Y10T83/5669; Y10T83/748; Y10T83/7487; Y10T83/7493; Y10T83/7507; Y10T83/768; Y10T83/7684; Y10T83/773; Y10T83/7755; Y10T83/7763; Y10T83/7784; Y10T83/7793; Y10T83/7809
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
134 words
In a machine for cutting sheet-like material, such as fabric, including a round knife rotatable about an axis and having a cutting edge and means for rotating said knife about such knife axis, the improvement which comprises a roller rotatable independently of said knife in use about another axis substantially parallel to said knife axis and free of any even indirect drive connection with said knife in use and having a curved peripheral surface provided with a circumferential groove penetrated by said cutting edge, said surface and that portion of said cutting edge which is entering said groove defining a nip, whereby such material to be cut may be fed toward said nip while contacting said surface adjacent said nip without movement relative to said surface in a direction extending circumferentially of said roller.
Claim 2
Dependent Claim
134 words
In a machine for cutting sheet-like material, such as fabric, including a round knife rotatable about an axis and having a cutting edge and means for rotating said knife about such knife axis, the improvement which comprises a roller rotatable independently of said knife in use about another axis substantially parallel to said knife axis and free of any even indirect drive connection with said knife in use and having a curved peripheral surface provided with a circumferential groove penetrated by said cutting edge, said surface and that portion of said cutting edge which is entering said groove defining a nip, whereby such material to be cut may be fed toward said nip while contacting said surface adjacent said nip without movement relative to said surface in a direction extending circumferentially of said roller.
Claim 3
Dependent Claim
21 words
A cutting machine according to claim 1 and further comprising means for pressing said material against said surface adjacent said nip.
Claim 4
Dependent Claim
20 words
A cutting machine according to claim 2 wherein said pressing means includes spaced means on opposite sides of said knife.
Claim 5
Dependent Claim
62 words
A cutting machine according to claim 2 wherein said pressing means includes a supporting structure having an elongated slot therein and track portions extending along opposite sides of said slot, said roller being adapted to be moved longitudinally of said slot to roll on and effect cutting of any of said material which may be interposed between said roller and track portions.
Claim 6
Dependent Claim
36 words
A cutting machine according to claim 4 wherein said track portions and the opposing portions of said peripheral surface are contoured in complementary fashion so as to guide said roller in its travel along said slot.
Claim 7
Dependent Claim
71 words
A cutting machine according to claim 5 wherein said supporting structure is a table top, said track portions are arranged on said table top to face upwardly, further comprising a manually movable carriage on which said roller is rotatably mounted and arranged above track portions, and said means for rotating said knife includes an electric motor arranged below said table top and connected to said carriage so as to move therewith.
Claim 8
Dependent Claim
82 words
A machine for cutting sheet-like material, such as fabric, along a slotted track, comprising a carriage arranged for movement along said track, knife means mounted on said carriage and having a cutting edge disposed within said track slot to cut material arranged in its path of movement, roller means mounted on said carriage to hold a portion of said material to said track, and smoothing means mounted on said carriage for smoothing sUch held portion of said material adjacent said cutting edge.
Claim 9
Dependent Claim
82 words
A machine for cutting sheet-like material, such as fabric, along a slotted track, comprising a carriage arranged for movement along said track, knife means mounted on said carriage and having a cutting edge disposed within said track slot to cut material arranged in its path of movement, roller means mounted on said carriage to hold a portion of said material to said track, and smoothing means mounted on said carriage for smoothing sUch held portion of said material adjacent said cutting edge.
Claim 10
Dependent Claim
39 words
A machine according to claim 7 wherein said smoothing means includes a cantilevered throat plate member having its fixed end mounted on said carriage and having its free end portion arranged to smooth said material adjacent said cutting edge.
Claim 11
Dependent Claim
13 words
A machine according to claim 8 wherein said throat plate member is arcuate.
Claim 12
Dependent Claim
43 words
A machine according to claim 9 wherein said throat plate member is provided with a longitudinal slot extending inwardly from the extremity of said free end portion to define two trails arranged on opposite sides of said knife means which penetrates said slot.
Claim 13
Dependent Claim
23 words
A machine according to claim 10 wherein each of said trails has a transversely concave upper surface and a transversely convex lower surface.
Claim 14
Dependent Claim
59 words
A machine according to claim 10 wherein said roller means has a circumferential groove, and the slotted free end portion of said throat plate member is arranged in said groove and has a curved lower surface substantially coterminous with the periphery of said roller means at the edges of said groove proximate where said cutting edge intersects said slot.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |