Patent US3726241A successfully refreshed from Google Patents.
US3726241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material stitching apparatus
Assignee: Clarkson Ltd W J
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Filing: 1971-10-26
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Granted: 1973-04-10
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Expires: 1991-10-26
Abstract
Abstract Apparatus for facilitating the stitching together of layers of material comprising in combination, a template capable of holding superposed layers of material, and being formed with a guide track; and a sewing machine having a guide member engageable with said guide track, and driving means for driving said template so that said guide track moves about said guide member, said driving means comprising a member pivotally mounted on a fixed bed of said sewing machine, a roller rotatably mounted on said member, biasing means for biasing said roller in a direction such that it can frictionally engage an edge of said template, and means for driving said roller in a given sense of rotation, the arrangement being such that when said roller is in engagement with said template, the angle between (a) the line joining the axis of rotation of said roller and the joint of contact between said roller and said template, and (b) the line joining said axis of rotation and the pivotal axis of said member, measured in the sense of rotation of said roller, lies between 190* and 270*. This relationship ensures good frictional engagement between the roller and the template. The drive means may include two or more concentric rollers of different diameter, and said template then has a guide track including straight and curved sections, an edge lying outside said guide track and shaped substantially complementary to said guide track, and drive parts in the region of said curved sections and displaced from said edge; one of said rollers being engageable with said edge and the other engageable with one or more of said drive parts, said edge and drive parts being shaped so that when one is engaged by one of said rollers the other is not engaged by any of said rollers. This arrangement can be designed to ensure that the speed of the guide track past the sewing machine needle is constant whether drive is applied to a straight or to a curved section of the template.
Inventors
- 👤 M Bennison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:50
CPC Classifications
D; D05; D05B; D05B39/00; D05B73/00; D05B73/04; D05B73/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
183 words
Apparatus for facilitating the stitching together of layers of material comprising in combination, a template capable of holding superposed layers of material, and being formed with a guide track; and a sewing machine having a guide member engageable with said guide track, and driving means for driving said template so that said guide track moves about said guide member, said driving means comprising a member pivotally mounted on a fixed bed of said sewing machine, a roller rotatably mounted on said member, biasing means for biasing said roller in a direction such that it can frictionally engage an edge of said template, and means for driving said roller in a given sense of rotation, the arrangement being such that when said roller is in engagement with said template, the angle between (a) the line joining the axis of rotation of said roller and the point of contact between said roller and said template, and (b) the line joining said axis of rotation and the pivotal axis of said member, measured in the sense of rotation of said roller, lies between 190* and 270*.
Claim 2
Dependent Claim
183 words
Apparatus for facilitating the stitching together of layers of material comprising in combination, a template capable of holding superposed layers of material, and being formed with a guide track; and a sewing machine having a guide member engageable with said guide track, and driving means for driving said template so that said guide track moves about said guide member, said driving means comprising a member pivotally mounted on a fixed bed of said sewing machine, a roller rotatably mounted on said member, biasing means for biasing said roller in a direction such that it can frictionally engage an edge of said template, and means for driving said roller in a given sense of rotation, the arrangement being such that when said roller is in engagement with said template, the angle between (a) the line joining the axis of rotation of said roller and the point of contact between said roller and said template, and (b) the line joining said axis of rotation and the pivotal axis of said member, measured in the sense of rotation of said roller, lies between 190* and 270*.
Claim 3
Dependent Claim
14 words
Apparatus according to claim 1 in which said edge of said roller is knurled.
Claim 4
Dependent Claim
16 words
Apparatus according to claim 1 in which said edge of said roller is of V-shaped cross-section.
Claim 5
Dependent Claim
14 words
Apparatus according to claim 1 in which said angle is from 210* to 240*.
Claim 6
Dependent Claim
67 words
Apparatus according to claim 1 in which said pivotally mounted member is a lever having said roller rotatably mounted at the end of a first arm thereof, and having one end of a tension spring anchored to the end of a second arm thereof, the other end of said tension spring being anchored to said bed of said sewing machine, and said spring constituting said biasing means.
Claim 7
Dependent Claim
108 words
Apparatus according to claim 1, said drive means including two or more concentric rollers of different diameter, and said template having a guide track including straight and curved sections, an edge lying outside said guide track and shaped substantially complementary to said guide track, and drive parts in the region of said curved sections and displaced from said edge; one of said rollers being engageable with said edge and the other engageable with one or more of said drive parts, said edge and drive parts being shaped so that when one is engaged by one of said rollers the other is not engaged by any of said rollers.
Claim 8
Dependent Claim
122 words
Apparatus for facilitating the stitching together of layers of material on a sewing machine, comprising a template for holding the material, said template having a guide track engageable by guide means on the sewing machine and including straight and curved sections, an edge lying outside said guide track and shaped substantially complementary to said guide track, and drive parts in the region of said curved sections and displaced from said edge; and at least two commonly driven concentric template driving means of different diameter, one engageable with said edge and another engageable with one or more of said drive parts, said edge and said drive parts being shaped so that when one is engaged by a driving means the other is not.
Claim 9
Dependent Claim
122 words
Apparatus for facilitating the stitching together of layers of material on a sewing machine, comprising a template for holding the material, said template having a guide track engageable by guide means on the sewing machine and including straight and curved sections, an edge lying outside said guide track and shaped substantially complementary to said guide track, and drive parts in the region of said curved sections and displaced from said edge; and at least two commonly driven concentric template driving means of different diameter, one engageable with said edge and another engageable with one or more of said drive parts, said edge and said drive parts being shaped so that when one is engaged by a driving means the other is not.
Claim 10
Dependent Claim
44 words
Apparatus according to claim 7 in which at least one of said drive parts lies inside of said edge, and two commonly driven concentric template driving means are provided, a larger diameter one engaging said drive parts and a smaller one engaging said edge.
Claim 11
Dependent Claim
44 words
Apparatus according to claim 7 in which at least one of said drive parts lies outside of said edge, and two commonly driven concentric template driving means are provided, a smaller diameter one engaging said drive parts and a larger one engaging said edge.
Claim 12
Dependent Claim
71 words
Apparatus according to claim 7 in which first ones of said drive parts lie inside of said edge, second ones of said drive parts lie outside of said edge, and three commonly driven concentric template driving means are provided, a larger diameter one engaging said first ones of said drive parts, an intermediate diameter one engaging said edge and a smaller diameter one engaging said second ones of said drive parts.
Claim 13
Dependent Claim
38 words
Apparatus according to claim 7 in which said template comprises a lower plate having a slot constituting said guide track and said drive parts are secured to, or formed integral with, an upper surface of said lower plate.
Claim 14
Dependent Claim
71 words
Apparatus according to claim 7 in which said template comprises a lower plate and a top plate hinged to said lower plate, both said plates being formed with aligned slots constituting said guide track, and the edge of the top and bottom plates being shaped differently so that one defines said edge, and the other, at curved sections of said edge is displaced from said edge to form said drive parts.
Claim 15
Dependent Claim
44 words
Apparatus according to claim 6 in which at least one of said drive parts lies inside of said edge, and two commonly driven concentric template driving means are provided, a larger diameter one engaging said drive parts and a smaller one engaging said edge.
Claim 16
Dependent Claim
44 words
Apparatus according to claim 6 in which at least one of said drive parts lies outside of said edge, and two commonly driven concentric template driving means are provided, a smaller diameter one engaging said drive parts and a larger one engaging said edge.
Claim 17
Dependent Claim
71 words
Apparatus according to claim 6 in which first ones of said drive parts lie inside of said edge, second ones of said drive parts lie outside of said edge, and three commonly driven concentric template driving means are provided, a larger diameter one engaging said first ones of said drive parts, an intermediate diameter one engaging said edge and a smaller diameter one engaging said second ones of said drive parts.
Claim 18
Dependent Claim
38 words
Apparatus according to claim 6 in which said template comprises a lower plate having a slot constituting said guide track and said drive parts are secured to, or formed integral with, an upper surface of said lower plate.
Claim 19
Dependent Claim
71 words
Apparatus according to claim 6 in which said template comprises a lower plate and a top plate hinged to said lower plate, both said plates being formed with aligned slots constituting said guide track, and the edge of the top and bottom plates being shaped differently so that one defines said edge, and the other, at curved sections of said edge is displaced from said edge to form said drive parts.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |