US3772955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stiffened cutting blade with replaceable edge member
Assignee: GARBER GARMENT Tech Inc
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Filing: 1971-09-23
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Granted: 1973-11-20
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Expires: 1991-09-23
Abstract
Abstract An elongated cutting blade for use in a cutting apparatus for cutting layups of fabric or other similar sheet material is adapted to be held at one end, in a cantilevered fashion, and reciprocated along its longitudinal axis when actively cutting. The blade is a composite part made up of an easily sharpenable edge member, which provides the cutting edge, and a stiffening rib extending along the rear edge of the edge member and serving to reduce lateral and rearward deflection. The rib is preferably made of tungsten carbide and is joined to the edge member by a means which allows the edge member to be removed therefrom and replaced by a new edge member after the edge member has been sharpened or worn beyond a desirable point.
Inventors
- 👤 D Pearl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:51
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/38; B26F1/3806; B26F1/3813; B26F1/382; B26D; B26D7/00; B26D7/26; B26D7/2614; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/936; Y10T; Y10T83/00; Y10T83/687; Y10T83/869; Y10T83/8821; Y10T83/8841; Y10T83/8853
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
362 words
A stiffened cutting blade for use in a cutting apparatus of the type employing an elongated cantilevered cutting blade reciprocated along its longitudinal axis, said cutting blade comprising an elongated edge member having two generally parallel side faces, a longitudinally extending rear edge, and a longitudinally extending front edge sharpened along at least a portion of its length, a stiffening rib extending along a portion of the length of said edge member, said stiffening rib having two side cheeks each engaging a respective one of said side faces of said edge member and each having a longitudinally extending front edge located a substantial distance rearwardly of said front edge of said edge member so that said edge member projects a substantial distance forwardly beyond said rib, and means releasably fixing said edge member to said rib to form them into a single unit, said rib being made of a material substantially stiffer than the material of said edge member and said edge member being made of a material substantially more sharpenable than the material of said rib, said rib including a longitudinally extending spine portion located rearwardly of said rear edge of said edge member and connecting said two cheeks to one another, and said edge member along its rear edge including a forwardly relieved portion which receives said spine, and said means for releasably fixing said edge member to said rib comprising a generally rearwardly and downwardly extending shoulder on said edge member defining the upper limit of said relieved portion and a generally rearwardly and upwardly extending shoulder defining the lower limit of said relieved portion, said spine having at its upper end a forwardly and upwardly extending shoulder and at its lower end a forwardly and downwardly extending shoulder, said shoulders of said spine being engageable with said shoulders of said edge member when said edge member is in its normal undeflected condition to hold said rib and edge member in assembly, and said edge member being bendable away from said normal undeflected condition to allow said shoulders to be moved into and out of engagement with one another to assemble and disassemble said rib and said edge member.
Claim 2
Dependent Claim
362 words
A stiffened cutting blade for use in a cutting apparatus of the type employing an elongated cantilevered cutting blade reciprocated along its longitudinal axis, said cutting blade comprising an elongated edge member having two generally parallel side faces, a longitudinally extending rear edge, and a longitudinally extending front edge sharpened along at least a portion of its length, a stiffening rib extending along a portion of the length of said edge member, said stiffening rib having two side cheeks each engaging a respective one of said side faces of said edge member and each having a longitudinally extending front edge located a substantial distance rearwardly of said front edge of said edge member so that said edge member projects a substantial distance forwardly beyond said rib, and means releasably fixing said edge member to said rib to form them into a single unit, said rib being made of a material substantially stiffer than the material of said edge member and said edge member being made of a material substantially more sharpenable than the material of said rib, said rib including a longitudinally extending spine portion located rearwardly of said rear edge of said edge member and connecting said two cheeks to one another, and said edge member along its rear edge including a forwardly relieved portion which receives said spine, and said means for releasably fixing said edge member to said rib comprising a generally rearwardly and downwardly extending shoulder on said edge member defining the upper limit of said relieved portion and a generally rearwardly and upwardly extending shoulder defining the lower limit of said relieved portion, said spine having at its upper end a forwardly and upwardly extending shoulder and at its lower end a forwardly and downwardly extending shoulder, said shoulders of said spine being engageable with said shoulders of said edge member when said edge member is in its normal undeflected condition to hold said rib and edge member in assembly, and said edge member being bendable away from said normal undeflected condition to allow said shoulders to be moved into and out of engagement with one another to assemble and disassemble said rib and said edge member.
Claim 3
Dependent Claim
33 words
A stiffened cutting blade as defined in claim 1 further characterized by said edge member having an elongated rear edge which below said spine is aligned with said rear edge of said spine.
Claim 4
Dependent Claim
33 words
A stiffened cutting blade as defined in claim 1 further characterized by said edge member having an elongated rear edge which above said spine is aligned with said rear edge of said spine.
Claim 5
Dependent Claim
315 words
A stiffened cutting blade for use in a cutting apparatus of the type employing an elongated cantilevered cutting blade reciprocated along its longitudinal axis, said cutting blade comprising an elongated edge member having two generally parallel side faces, a longitudinally extending rear edge, and a longitudinally extending front edge sharpened along at least a portion of its length, said rear edge including a straight upper portion and a straight lower portion located along a common straight line and also including an intermediate portion between said upper and lower portions which intermediate portion is located forwardly of said common straight line, a stiffening rib extending along said intermediate portion of said rear edge of said edge member, said stiffening rib having a thickness, as measured perpendicular to said parallel side faces of said edge member, greater than that of said edge member and including two cheeks each engaging a respective one of said side faces and each having a longitudinally extending front edge located a substantial distance rearwardly of said front edge of said edge member so that said edge member projects a substantial distance forwardly beyond said rib, said rib also including a spine portion located rearwardly of said intermediate portion of said rear edge of said edge member and connected to said two cheek portions, said spine having a straight rear edge aligned with said upper and lower portions of said rear edge of said edge member, and means for releasably fixing said edge member to said rib to form them into a single unit, said rib being made of a material substantially stiffer than the material of said edge member and said edge member being made of a material substantially softer than the material of the rib and therefore more sharpenable than the material of said rib, said rib being adapted to be slidably mounted in a guide means in sAid cutting apparatus.
Claim 6
Dependent Claim
315 words
A stiffened cutting blade for use in a cutting apparatus of the type employing an elongated cantilevered cutting blade reciprocated along its longitudinal axis, said cutting blade comprising an elongated edge member having two generally parallel side faces, a longitudinally extending rear edge, and a longitudinally extending front edge sharpened along at least a portion of its length, said rear edge including a straight upper portion and a straight lower portion located along a common straight line and also including an intermediate portion between said upper and lower portions which intermediate portion is located forwardly of said common straight line, a stiffening rib extending along said intermediate portion of said rear edge of said edge member, said stiffening rib having a thickness, as measured perpendicular to said parallel side faces of said edge member, greater than that of said edge member and including two cheeks each engaging a respective one of said side faces and each having a longitudinally extending front edge located a substantial distance rearwardly of said front edge of said edge member so that said edge member projects a substantial distance forwardly beyond said rib, said rib also including a spine portion located rearwardly of said intermediate portion of said rear edge of said edge member and connected to said two cheek portions, said spine having a straight rear edge aligned with said upper and lower portions of said rear edge of said edge member, and means for releasably fixing said edge member to said rib to form them into a single unit, said rib being made of a material substantially stiffer than the material of said edge member and said edge member being made of a material substantially softer than the material of the rib and therefore more sharpenable than the material of said rib, said rib being adapted to be slidably mounted in a guide means in sAid cutting apparatus.
Claim 7
Dependent Claim
26 words
A stiffened cutting blade as defined in claim 4 further characterized by said cheeks of said rib extending downwardly beyond the lower end of said spine.
Claim 8
Dependent Claim
26 words
A stiffened blade as defined in claim 4 further characterized by said edge member being made of steel and said rib being made of tungsten carbide.
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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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |