Patent US3685556A successfully refreshed from Google Patents.
US3685556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contour cutting apparatus
Assignee: Individual
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Filing: 1970-09-30
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Granted: 1972-08-22
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Expires: 1990-09-30
Abstract
Abstract A work feeding apparatus for power tools of the class having a cutting tool operating in a fixed zone of a stationary work table. A pair of opposed guide means fixed on opposite sides of the tool zone define a channel through which successive work pieces advance to be cut by the tool, the pair of guide means being of a predetermined profile to effect cutting of a desired straight and/or curved contour in each work piece. A pair of power-driven feed rolls are positioned at entrance and exit ends of the channel, each being independently biased into driving engagement with the work piece to accommodate varying angularities of the work piece relative to the tool. The pair of feed rolls are also counterbalanced to be equally offset from the blade during straight cuts in the work piece. The feed roll at the entry to the channel is yieldably linked to an opposing counterpressure roll to augment the force of the entry feed roll in feeding the work piece while decreasing frictional resistance of the guide means to passage of the work piece. The pair of drive rolls are drivingly coupled together by a means including a limited lost motion to accommodate a difference in angular speed of one of the rolls in transition from an idle to a driving phase.
Inventors
- 👤 Don C Vansickle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:22
CPC Classifications
B; B23; B23D; B23D59/00; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/10; B23Q35/101; B23Q35/105; B27; B27B; B27B25/00; Y; Y10; Y10T; Y10T83/00; Y10T83/647; Y10T83/654; Y10T83/6542
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
171 words
Work feeding apparatus for contour cutting of elongated work pieces, comprising: a work table having a fixed tool zone; a spaced pair of rigid guide means affixed to said table to define a laterally extending work piece passage therebetween and through said tool zone; a pair of feed rolls mounted on said table at spaced locations on opposite sides of said tool zone and along one of said guide means; each of said feed rolls being mounted for movement towards and away from the other of said guide means; said pair of feed rolls being independently biased toward the other of said guide means to bias a work piece into guided contact with said other guide means independently of the other of said feed rolls; said pair of feed rolls each normally projecting into said passage defined by said pair of guide means to be sequentially laterally displaced by a work piece fed thereinto; and a means for driving said feed rolls to feed a work piece through said tool zone.
Claim 2
Dependent Claim
171 words
Work feeding apparatus for contour cutting of elongated work pieces, comprising: a work table having a fixed tool zone; a spaced pair of rigid guide means affixed to said table to define a laterally extending work piece passage therebetween and through said tool zone; a pair of feed rolls mounted on said table at spaced locations on opposite sides of said tool zone and along one of said guide means; each of said feed rolls being mounted for movement towards and away from the other of said guide means; said pair of feed rolls being independently biased toward the other of said guide means to bias a work piece into guided contact with said other guide means independently of the other of said feed rolls; said pair of feed rolls each normally projecting into said passage defined by said pair of guide means to be sequentially laterally displaced by a work piece fed thereinto; and a means for driving said feed rolls to feed a work piece through said tool zone.
Claim 3
Dependent Claim
96 words
An apparatus as in claim 1 in which: said pair of guide means define a curved sector in said passage comprising a convex portion of said other guide means and a concave portion of said one guide means; said portions being adapted to translate linear movement of a work piece through said passage into turning of the work piece for arcuate cutting of the work piece; said pair of feed rolls being adapted and arranged for simultaneously biasing a work piece against said convex portion during one phase of the work piece movement through said passage.
Claim 4
Dependent Claim
33 words
An apparatus as in claim 2 in which said pair of feed rolls are interconnected by a common biasing means to simultaneously bias both of said rolls into engagement with a work piece.
Claim 5
Dependent Claim
52 words
An apparatus as in claim 3 in which each of said rolls is interconnected to a spring means for independently biasing said roll into contact with a work piece, each of said spring means including a means to adjust the force thereof whereby the pair of said spring means can be counterbalanced.
Claim 6
Dependent Claim
81 words
An apparatus as iN claim 1 in which: a counterpressure roller is movably mounted on said table in opposition to one of said feed rolls at an entry end of said passage; said one feed roll and said roller being yieldably interconnected by a means adapted to translate displacement of said one feed roll by a work piece into corresponding displacement of said roller and further adapted to bias said roller against a work piece during such displacement of said roller.
Claim 7
Dependent Claim
38 words
An apparatus as in claim 5 in which said means interconnecting said roller and said one feed roll comprises a linkage including a spring means that normally biases said roller and said one feed roll toward one another.
Claim 8
Dependent Claim
36 words
An apparatus as in claim 1 in which said pair of feed rolls are simultaneously driven by said power means, one of said feed rolls being interconnected to said power means by an overrunning clutch means.
Claim 9
Dependent Claim
61 words
An apparatus as in claim 1 in which: said one guide means includes a concave sector; said pair of feed rolls being adapted to normally project radially inwardly of tangents to the opposite ends of said concave sector; said pair of feed rolls each having a mounting means adapted to selectively positively limit such radially inward projection of said feed rolls.
Claim 10
Dependent Claim
146 words
An apparatus as in claim 8 in which: said other guide means includes a convex sector in confronting relationship to said concave sector; said convex sector being defined by a plurality of rollers adapted for sequential rolling engagement with one side of a work piece; said concave sector being defined by a continuous rigid surface adapted for sliding engagement with an edge of an opposite side of a work piece; one of said feed rolls at an entry end of said passage being interconnected to a counterpressure roller; said one feed roll and said roller being yieldably interconnected by a means adapted to translate displacement of said one feed roll by a work piece into corresponding displacement of said roller and further adapted to bias said roller against the opposite side of the work piece from said one feed roll during such displacement of said roller.
Claim 11
Dependent Claim
60 words
An apparatus as in claim 1 in which: each of said feed rolls is mounted on an end of one arm of a bell crank; said bell crank having one end of a second arm interconnected to a spring biased rod adapted to bias the corresponding one of said rolls into forceful engagement with a side of a work piece.
Claim 12
Dependent Claim
42 words
An apparatus as in claim 10 in which each of said rods is mounted on opposite sides of a yoke, said yoke being mounted on a spring biased shaft adapted to simultaneously bias said pair of feed rolls against a work piece.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |