US3817142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Band knife guiding device
Assignee: Fortuna Werke Maschinenfabrik GmbH
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Filing: 1972-08-22
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Granted: 1974-06-18
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Expires: 1992-08-22
Abstract
Abstract A longitudinally movable band knife of a leather splitting machine, is guided between edge portions of first and second guide plates. The lower guide plate is stationary, and the upper guide plate is mounted for universal movement about a fulcrum point so that the upper guide plate can be displaced about a first axis perpendicular to the cutting edge of the band knife, and about a second axis parallel to the cutting edge and intersecting the first axis at a fulcrum point so that the upper edge portion always has full contact with the moving band knife when a preferably self-locking biassing device turns the upper guide plate about the second axis to press with the respective guide edge portion against the band knife. Turning of the upper guide plate about a third axis perpendicular to the plane of the intersecting first and second axes, is prevented by blocking parts on the lower guide plate, projecting into openings in the upper guide plate located along the second axis.
Inventors
- 👤 K Fingerle
- 👤 K Haag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:29
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/46; B26D1/54; C; C14; C14B; C14B1/00; C14B1/02; C14B1/14; C14B2700/00; C14B2700/10; Y; Y10; Y10T; Y10T83/00; Y10T83/707; Y10T83/7264; Y10T83/869; Y10T83/8878; Y10T83/8886
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
104 words
Band knife guiding device comprising first and second guide means; a longitudinally movable band knife located between said guide means and having opposite faces bounded by a cutting edge and slidably engaged by said first and second guide means; and mounting means secured to said second guide means and supporting said first guide means for movement against said band knife about a fulcrum point so that said first guide means is free to become angularly displaced about a first axis peRpendicular to said cutting edge, and about a second axis parallel to said cutting edge and intersecting said first axis at said fulcrum point.
Claim 2
Dependent Claim
104 words
Band knife guiding device comprising first and second guide means; a longitudinally movable band knife located between said guide means and having opposite faces bounded by a cutting edge and slidably engaged by said first and second guide means; and mounting means secured to said second guide means and supporting said first guide means for movement against said band knife about a fulcrum point so that said first guide means is free to become angularly displaced about a first axis peRpendicular to said cutting edge, and about a second axis parallel to said cutting edge and intersecting said first axis at said fulcrum point.
Claim 3
Dependent Claim
43 words
Band knife guiding device as claimed in claim 1 comprising biassing means disposed between said first and second guide means for angularly displacing said second guide means about said second axis so that said second guide means is pressed against said band knife.
Claim 4
Dependent Claim
27 words
Band knife guiding device as claimed in claim 2 wherein said biassing means are located on the side of said second axis remote from said band knife.
Claim 5
Dependent Claim
30 words
Band knife guiding device as claimed in claim 3 wherein said biassing means includes spring means and is located in a third axis perpendicular to said first and second axes.
Claim 6
Dependent Claim
59 words
Band knife guiding device as claimed in claim 3 wherein said biassing means include self-locking means abutting said first and second guide means, and spring means biassing said self-locking means so that said first guide means is resiliently pressed against said band knife but cannot be turned from said band knife about said first axis by the cut material.
Claim 7
Dependent Claim
116 words
Band knife guiding device as claimed in claim 5 wherein said second guide means has a top face confronting the bottom face of said first guide means, and formed with a guide way parallel to said second axis; wherein said self-locking means includes at least one wedge-shaped slide guided in said guideway, a follower means secured to said bottom face of said first guide means and slidably engaging said wedge-shaped slide, and a spring urging said slide to move in said guideway so that said wedge-shaped slide acts on said follower means and on said first guide means to turn the latter about said second axis for pressing said first guide means against said band knife.
Claim 8
Dependent Claim
49 words
Band knife guiding device as claimed in claim 6 including two wedge-shaped slides in said guideway disposed symmetrically to said first axis, and spring means urging said slides toward each other; and wherein said follower means include two followers on said first guide means cooperating with said slides, respectively.
Claim 9
Dependent Claim
48 words
Band knife guiding device as claimed in claim 7 comprising an attaching means located in said guideway in the region of said first axis; and wherein said spring means include two springs having inner ends secured to said attaching means and outer ends secured to said slides, respectively.
Claim 10
Dependent Claim
55 words
Band knife guiding device as claimed in claim 1 wherein said mounting means include a hemispherical concave seat in one of said guide means, and a hemispherical convex member secured to the other guide means slidably engaging said seat, the centers of said hemispherical seat and of said hemispherical member coinciding at said fulcrum point.
Claim 11
Dependent Claim
81 words
Band knife guiding device as claimed in claim 1 wherein said second guide means has a bore perpendicular to the plane formed by said intersecting first and second axes; wherein said first guide means has a hemispherical concave seat; and wherein said mounting means include a stem portion secured in said bore, and a mounting portion having a hemispherical convex surface slidably engaging said seat, the centers of said hemispherical seat and of said hemispherical surface coinciding at said fulcrum point.
Claim 12
Dependent Claim
69 words
Band knife guiding device as claimed in claim 10 wherein said mounting means includes a threaded bolt having said stem portion, and a head portion having said hemispherical convex surface; and wherein said first guide means has said seat on the outside thereof, and is formed with a bore therethrough opening in said seat aligned with said bore for receiving the portion of said stem adjacent said head portion.
Claim 13
Dependent Claim
32 words
Band knife guiding device as claimed in claim 10 wherein said mounting means includes a spring surrounding said stem and abutting the inner confronting surfaces of said first and second guide means.
Claim 14
Dependent Claim
44 words
Band knife guiding device as claimed in claim 1 and comprising blocking means connecting said first and secOnd guide means spaced from said mounting means for blocking turning movement of said first and second guide means relative to each other about said third axis.
Claim 15
Dependent Claim
41 words
Band knife guiding device as claimed in claim 13 wherein said blocking means include at least one opening in one of said guide means, and at least one blocking member secured to the other guide means and projecting into said opening.
Claim 16
Dependent Claim
44 words
Band knife guiding device as claimed in claim 14 wherein said blocking member includes a stepped sleeve having an annular shoulder, and a screw threaded into said second guide means and passing through said sleeve, said screw having a head abutting said annular shoulder.
Claim 17
Dependent Claim
80 words
Band knife guiding device as claimed in claim 14 wherein said opening in said first guide means has a wide portion and a narrow end portion; wherein said blocking member has a portion freely movable in said wide portion of said opening, and an end portion fitting into said narrow end portion of said opening with small tolerances, said narrow end portion being substantially located in a plane formed by said first and second axes passing through said fulcrum point.
Claim 18
Dependent Claim
50 words
Band knife guiding device as claimed in claim 13 wherein said blocking means include two blocking members secured to said second guide means and located in said second axis spaced from said fulcrum point, and two openings in said second guide means receiving the ends of said blocking members, respectively.
Claim 19
Dependent Claim
129 words
Band knife guiding device as claimed in claim 1 comprising biassing means disposed between said first and second guide means for angularly displacing said first guide means about said second axis so that said first guide means is pressed against said band knife; wherein said mounting means include a hemispherical concave seat in one of said guide means, and a hemispherical convex member secured to the other guide means slidably engaging said seat, the centers of said hemispherical seat and of said hemispherical member coinciding at said fulcrum point; and comprising blocking means connecting said first and second guide means spaced from said mounting means for blocking turning movement of said first and second guide means relative to each other about said third axis passing through said fulcrum point.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |