Claims
- 1. In a sharpener for machinery knife blades, the improvement comprising:
- a frame having a grinder head with an abrasive element mounted thereon;
- an elongate bracket having means for retaining a knife blade with a cutting edge in a predetermined relationship with respect to said abrasive element;
- means for translating said grinder head with said abrasive element along a plane generally parallel to a knife blade; and
- means for mounting said elongated bracket to said frame, and including means for adjusting the position of one end of said elongated bracket with respect to the other end of said bracket to align a knife blade held thereby with the translation plane of said grinder head, said adjusting means comprising at least three threaded studs, threadedly mounted in three associated tabs which project inwardly from an end portion of said frame, and are arranged in a spaced apart relationship thereon; said studs having inwardly directed terminal ends which form a socket in which said one bracket end is received, and abuttingly and adjustably supported.
- 2. A sharpener as set forth in claim 1 wherein:
- said bracket mounting means includes means rotatably mounting said bracket on said frame in a manner wherein said blade is oriented substantially along a plane which intersects the axis of rotation of said bracket, whereby said blade is rotatable in said frame to vary the blade cutting edge presented to the abrasive element without requiring substantial repositioning of the grinder head.
- 3. A sharpener for industrial knife blades comprising:
- a main frame including means for releasably retaining a knife blade in a fixed relationship therewith, and an elongate beam having first and second way surfaces disposed on opposite faces of said beam;
- grinding means for sharpening a cutting edge of the knife blade;
- a carriage having means for movably mounting said grinding means on said beam for translation thereon along a plane disposed substantially parallel with the cutting edge of said knife blade; said carriage comprising at least one generally L-shaped support with opposite legs; said mounting means comprising first and second bearings mounted on the opposite legs of said support, and being positioned for abutting contact with said first and second way surfaces, respectively; and
- said support being semi-rigid and resilient in the plane of said support legs, and said first and second bearings being spaced apart in an unstressed support condition a distance which is slightly less than the distance between the first and second way surfaces on said beam, whereby when said carriage is assembled onto said beam, the ends of said support legs are diverged a distance sufficient to permit said first and second bearings to be positioned onto said first and second way surfaces, and said diverged support legs function as a leaf spring to resiliently urge said first and second bearings against said first and second way surfaces to securely retain and guide said carriage on said beam for accurate grinding of the knife blade.
- 4. A sharpener as set forth in claim 3, wherein:
- said beam includes a second pair of opposite faces on which third and fourth way surfaces are disposed, and including,
- third and fourth bearings mounted on opposite legs of said support, and being spaced thereon for abutting contact with said third and fourth way surfaces, respectively.
- 5. A sharpener as set forth in claim 4, including:
- means for resiliently urging said third and fourth bearings against said third and fourth way surfaces, respectively.
- 6. A sharpener as set forth in claim 5, wherein:
- said third and fourth bearings are spaced apart in the unstressed support condition a distance which is slightly less than the distance between said third and fourth way surfaces, whereby when said carriage is assembled onto said beam, the leaf spring action of said support legs also defines said resilient urging means for said third and fourth bearings.
- 7. A sharpener as set forth in claim 6, wherein:
- said bearings comprise rollers.
- 8. A sharpener as set forth in claim 7, wherein:
- said rollers are rotatably mounted on eccentric shafts for varying the spring force between said rollers and said way surfaces.
- 9. A sharpener as set forth in claim 8, wherein:
- said beam has a substantially regular, quadrangular transverse cross-sectional shape.
- 10. A sharpener as set forth in claim 9, wherein:
- said beam has a substantially square transverse cross-sectional shape.
- 11. A sharpener as set forth in claim 10, wherein:
- said way surfaces include concave tracks in which said bearings are slidingly received.
- 12. A sharpener as set forth in claim 3, wherein:
- said bearings comprise rollers.
- 13. A sharpener as set forth in claim 3, wherein:
- said bearings are mounted on eccentric shafts for varying the spring force between said bearings and said way surfaces.
- 14. A sharpener as set forth in claim 3, wherein:
- said beam has a substantially regular, quadrangular transverse cross-sectional shape.
- 15. A sharpener as set forth in claim 3, wherein:
- said way surfaces include concave tracks in which said bearings are slidingly received.
- 16. A sharpener as set forth in claim 3, wherein:
- said carriage includes a second L-shaped support spaced laterally from said first named support, and connected therewith by cross braces; and including,
- a third bearing mounted on one leg of said second support, and being positioned thereon for abutting contact with an adjacent one of said way surfaces.
- 17. A sharpener as set forth in claim 16, wherein:
- said beam includes a second pair of opposite faces on which third and fourth way surfaces are disposed; and including,
- fourth and fifth bearings mounted on opposite legs of said carriage and being spaced thereon for abutting contact with said third and fourth way surfaces, respectively.
- 18. A sharpener as set forth in claim 17, including:
- means for resiliently urging said fourth and fifth bearings against said third and fourth way surfaces, respectively.
- 19. A sharpener as set forth in claim 18, wherein:
- said fourth and fifth bearings are spaced apart in an unstressed support condition a distance which is slightly less than the distance between said third and fourth way surfaces, whereby when said carriage is assembled onto said beam, a leaf spring action from said support legs defines said resilient urging means for said third and fourth bearings.
- 20. A sharpener as set forth in claim 19, including:
- a sixth bearing mounted on said carriage for abutting contact with said one of said third and fourth way surfaces.
- 21. A sharpener as set forth in claim 20, wherein:
- said bearings comprise rollers.
- 22. A sharpener as set forth in claim 21, wherein:
- said rollers are rotatably mounted on eccentric shafts for varying the spring force between said rollers and said way surfaces.
- 23. A sharpener as set forth in claim 22, wherein:
- said beam has a substantially regular, quadrangular transverse cross-sectional shape.
- 24. A sharpener as set forth in claim 23, including:
- means for mounting said grinding means between said first and second L-shaped supports.
- 25. A sharpener as set forth in claim 24, wherein:
- said way surfaces include concave tracks in which said bearings are slidingly received.
- 26. A sharpener as set forth in claim 25, wherein:
- said rollers have a peripheral surface with an arcuate transverse cross-sectional shape which mates with the transverse cross-sectional shape of said tracks.
- 27. A sharpener for industrial knife blades comprising:
- a main frame including means for releasably retaining a knife blade in a fixed relationship therewith, and an elongate beam having first and second way surfaces disposed on opposite faces of said beam;
- grinding means for sharpening a cutting edge of the knife blade;
- a carriage having means for movably mounting said grinding means on said beam for translation thereon along a plane disposed substantially parallel with the cutting edge of said knife blade; said carriage comprising at least one generally L-shaped support; said mounting means comprising first and second bearings, connected with said support adjacent an end of each leg of said support, and being adapted for abutting contact with said first and second way surfaces, respectively; and
- said support being semi-rigid, and resilient in the plane of said support legs, and said first and second bearings being spaced apart in an unstressed support condition a distance slightly closer than the distance between the first and second way surfaces on said beam, whereby when said carriage is assembled onto said beam the ends of said support legs are diverged a distance sufficient to permit said first and second bearings to be positioned onto said first and second way surfaces, and said diverged support legs function as a leaf spring to resiliently force said first and second bearings against said first and second way surfaces to securely retain and guide said carriage on said beam for accurate grinding of the knife blade.
- 28. A sharpener as set forth in claim 27, wherein:
- said beam includes a second pair of opposite faces on which third and fourth way surfaces are disposed, and including,
- third and fourth bearings mounted on opposite legs of said support, and being spaced thereon for abutting contact with said third and fourth way surfaces, respectively, and
- means for resiliently urging said third and fourth bearings against said third and fourth way surfaces, respectively.
- 29. A sharpener as set forth in claim 28, wherein:
- said third and fourth bearings are spaced apart in the unstressed support condition a distance which is slightly less than the distance between said third and fourth way surfaces, whereby when said carriage is assembled onto said beam, the leaf spring action of said support legs also defines said resilient urging means for said third and fourth bearings.
- 30. A sharpener for industrial knife blades comprising:
- a main frame including means for releasably retaining a knife blade in a fixed relationship therewith, and an elongate beam having first and second way surfaces disposed on opposite faces of said beam;
- grinding means for sharpening a cutting edge of the knife blade;
- a carriage having means for movably mounting said grinding means on said beam for translation thereon along a plane disposed substantially parallel with the cutting edge of said knife blade; said carriage comprising at least one generally L-shaped support with opposite legs; said mounting means comprising first and second bearings mounted on the opposite legs of said support, and being positioned for abutting contact with said first and second way surfaces, respectively;
- means for resiliently urging said first and second bearings against said first and second way surfaces to securely retain and guide said carriage on said beam for accurate grinding of the knife blade; and
- said bearings being mounted on eccentric shafts for varying the spring force between said bearings and said way surfaces.
- 31. A sharpener for industrial knife blades comprising:
- a main frame including means for releasably retaining a knife blade in a fixed relationship therewith, and an elongate beam having first and second way surfaces disposed on mutually parallel, diametrically opposed faces of said beam;
- grinding means for sharpening a cutting edge of the knife blade;
- a carriage having means for movably mounting said grinding means on said beam for translation thereon along a plane disposed substantially parallel with the cutting edge of said knife blade; said carriage comprising at least one generally L-shaped support with opposite legs; said mounting means comprising first and second bearings mounted on the opposite legs of said support, and being positioned for abutting contact with said first and second way surfaces, respectively, thereby capturing said carriage on said beam; and
- means for resiliently urging said first and second bearings against said first and second way surfaces to securely retain and guide said carriage on said beam for accurate grinding of the knife blade.
Parent Case Info
This is a continuation of application Ser. No. 79,353, filed Sept. 27, 1979 on SHARPENER FOR INDUSTRIAL KNIFE BLADES, now U.S. Pat. No. 4,313,283.
US Referenced Citations (12)
Continuations (1)
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Number |
Date |
Country |
Parent |
79353 |
Sep 1979 |
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