US3732907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for separating small pieces from a work piece of material
Assignee: PITEA MASKIN INDUSTRI
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Filing: 1970-08-24
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Granted: 1973-05-15
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Expires: 1990-08-24
Abstract
Abstract The invention relates to a method for separating small pieces from blanks of material by using a device comprising a plurality of cutting elements, with short cutting edges as compared with the blank, said cutting elements being so arranged on the face of a rotating cutting element holding means with their edges pointing essentially in the direction of rotation, that always a plurality of said edges are in holding engagement with the blank during the rotation of said holding means when said blank is moved along a path intersecting said face. The feeding path has a projection, the direction of which is essentially parallel to the direction of the tangents of the orbits of the cutting elements in the place where said path intersects said face. When applicated to a method of chipping timber the invention has the consequence that an elongated chip blank is cut from a sloping end face of the log by each cutting element, the width of said chip blank as determined by the length of said cutting edge being the same as the width of a separate chip, the length of each chip being determined by the angle between the direction of the fibers in the blank and the direction of the thickness of the blank. The invention also relates to a device for separating small pieces from a blank of material, particularly a chipping machine for chipping timber to chips, said device comprising a plurality of cutting elements, with short cutting edges as compared with at least the next smallest dimension of the blank, said cutting elements being so arranged on the face of a rotating cutting element holding means at different distances from the axis of rotation of said holding means and with the edges pointing essentially in a direction of rotation, that always a plurality of said edges are in holding engagement with the blank during the rotation of said holding means when said blank is moved along a path intersecting said face. The inclination of the back of the cutting element, i.e. the surface of the cutting elements directed towards the blank and the abutting the cutting edge, towards a plane including the rotational path of the cutting element is different between the cutting elements in such a manner that it increases with a reduced spacing between the cutting element and the axis of rotation of the holding means. In another device for carrying out the method the cutting elements are arranged on a cylinder and the feeding path for the blank to be separated extends at a right angle to the cylinder axis.
Inventors
- 👤 S Nystrom
- 👤 G Larsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:59
CPC Classifications
B; B27; B27G; B27G13/00; B27G13/08; B27L; B27L11/00; B27L11/005; B27L11/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
160 words
A device for chipping logs or the like into chips comprising a. a rotatable planar surface means, b. a plurality of cutting element holding means mounted on said rotatable planar surface, c. a cutting element mounted in each cutting element holding means, d. said cutting elements 1. arranged in a plurality of concentric circles on said rotatable planar surface, 2. being located at spaced intervals around the circumference of each concentric circle, 3. having cutting edges that extend parallel to said surface means, and 4. pointing substantially in the direction of rotation of said rotatable surface, e. means for guiding logs against said surface means so that there is an acute angle formed between the axis of said log and the plane of said surface means, and f. a plurality of holes in said rotatable planar surface means, each hole being located adjacent a cutting element so that any chips formed by said cutting elements may pass through said holes.
Claim 2
Independent Claim
160 words
A device for chipping logs or the like into chips comprising a. a rotatable planar surface means, b. a plurality of cutting element holding means mounted on said rotatable planar surface, c. a cutting element mounted in each cutting element holding means, d. said cutting elements 1. arranged in a plurality of concentric circles on said rotatable planar surface, 2. being located at spaced intervals around the circumference of each concentric circle, 3. having cutting edges that extend parallel to said surface means, and 4. pointing substantially in the direction of rotation of said rotatable surface, e. means for guiding logs against said surface means so that there is an acute angle formed between the axis of said log and the plane of said surface means, and f. a plurality of holes in said rotatable planar surface means, each hole being located adjacent a cutting element so that any chips formed by said cutting elements may pass through said holes.
Claim 3
Dependent Claim
12 words
being located at spaced intervals around the circumference of each concentric circle,
Claim 4
Dependent Claim
12 words
being located at spaced intervals around the circumference of each concentric circle,
Claim 5
Dependent Claim
23 words
A device according to claim 1 wherein the spacings between the cutting elements are arranged closer together as the concentric circles progress inwardly.
Claim 6
Dependent Claim
11 words
being located at spaced intervals around the circumference of each circle,
Claim 7
Dependent Claim
11 words
being located at spaced intervals around the circumference of each circle,
Claim 8
Dependent Claim
12 words
having cutting edges that extend essentially parallel to said supporting surface, and
Claim 9
Dependent Claim
12 words
having cutting edges that extend essentially parallel to said supporting surface, and
Claim 10
Dependent Claim
11 words
having cutting edges that extend parallel to said surface means, and
Claim 11
Dependent Claim
11 words
having cutting edges that extend parallel to said surface means, and
Claim 12
Dependent Claim
33 words
A device according to claim 1 wherein the angle of inclination between the cutting element and the rotatable planar surface is different in one said concentric circle as compared to another concentric circle.
Claim 13
Dependent Claim
99 words
pointing substantially in the direction of rotation of said rotatable supporting surface, e. means for guiding logs against said rotatable supporting surface so that the axis of said log extends essentially in a plane parallel to a tangent of a portion of said circles passing through the place on said rotatable surface where the log is brought into contact with said surface by said guiding means, and f. a plurality of holes in said rotatable supporting surface each hole being located adjacent a cutting element so that any chips formed by said cutting elements may pass through said holes.
Claim 14
Dependent Claim
99 words
pointing substantially in the direction of rotation of said rotatable supporting surface, e. means for guiding logs against said rotatable supporting surface so that the axis of said log extends essentially in a plane parallel to a tangent of a portion of said circles passing through the place on said rotatable surface where the log is brought into contact with said surface by said guiding means, and f. a plurality of holes in said rotatable supporting surface each hole being located adjacent a cutting element so that any chips formed by said cutting elements may pass through said holes.
Claim 15
Dependent Claim
75 words
pointing substantially in the direction of rotation of said rotatable surface, e. means for guiding logs against said surface means so that there is an acute angle formed between the axis of said log and the plane of said surface means, and f. a plurality of holes in said rotatable planar surface means, each hole being located adjacent a cutting element so that any chips formed by said cutting elements may pass through said holes.
Claim 16
Dependent Claim
75 words
pointing substantially in the direction of rotation of said rotatable surface, e. means for guiding logs against said surface means so that there is an acute angle formed between the axis of said log and the plane of said surface means, and f. a plurality of holes in said rotatable planar surface means, each hole being located adjacent a cutting element so that any chips formed by said cutting elements may pass through said holes.
Claim 17
Dependent Claim
35 words
A device according to claim 3 wherein said angle of inclination of cutting elements in a given circle is greater than the angle of inclination of the cutting elements in the next exteriorly annular circle.
Claim 18
Dependent Claim
41 words
A device according to claim 3 wherein said inclination is adjustable by means of a cutting element holder arranged on said surface means, said cutting element holder having a surface in the same plane as the back of the cutting edge.
Claim 19
Dependent Claim
46 words
A device according to claim 5 wherein each holder is detachably arranged in a recess in said surface means, the underside of the holder abutting against an adjustment element in the bottom of said recess adjacent the end of the holder remote from the cutting element.
Claim 20
Dependent Claim
43 words
A device according to claim 1 wherein the cutting elements are arranged a radial distance from each other on the same order of magnitude as the length of cutting edges, an equal number of the cutting elements being arranged on each concentric circle.
Claim 21
Dependent Claim
66 words
A device aCcording to claim 1 wherein said cutting elements are reversible, each cutting element in a section parallel to the sides of said element between which the two edges extend being V-shaped with an obtuse angle between the legs of the V-section and each cutting element being detachably secured in a cutting element holder by clamping the leg which is terminated by the unused edge.
Claim 22
Dependent Claim
36 words
A device according to claim 1 wherein the arrangement of said cutting elements on said rotatable planar surface appears as a number of lines extending substantially helically from the outermost to the innermost of said circles.
Claim 23
Dependent Claim
29 words
A device according to claim 8 wherein the angle formed by each cutting edge as viewed in cross-section is substantially equal to the complement angle of said obtuse angle.
Claim 24
Independent Claim
44 words
A device for chipping logs or the like into chips comprising a. a rotatable supporting surface, b. a plurality of cutting element holding means mounted on said supporting surface, c. a cutting element mounted in each cutting element holding means, d. said cutting elements
Claim 25
Independent Claim
44 words
A device for chipping logs or the like into chips comprising a. a rotatable supporting surface, b. a plurality of cutting element holding means mounted on said supporting surface, c. a cutting element mounted in each cutting element holding means, d. said cutting elements
Claim 26
Dependent Claim
65 words
A device according to claim 11 for chipping logs into chips having two first essentially parallel sides intersecting the fibers of the chip, two second essentially parallel sides extending essentially perpendicular to said first sides, and two third sides intersecting said first and second sides, wherein the length of said cutting edges is at least approximately the same as the distance between said first sides.
Claim 27
Dependent Claim
52 words
A device according to claim 11 wherein said concentric circles are at different distances from the axis of rotation of said rotatable surface, and the angle of inclination of cutting elements in a given circle is greater than the angle of inclination of the cutting elements in the next exteriorly annular circle.
Claim 28
Dependent Claim
42 words
A device according to claim 11 wherein the concentric circles are at a distance from each other on the same order of magnitude as the length of cutting edges, an equal number of the cutting elements being arranged on each concentric circle.
References Cited (Backward Citations)
US1195774A
Cited
CH103106A
Cited
US2183224A
Cited
US2655319A
Cited
US2847045A
Cited
US2889861A
Cited
US3304970A
Cited
US3407854A
Cited
US3559705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |