Patent US3866640A successfully refreshed from Google Patents.
US3866640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Log feeding device
Assignee: MARPLEX PRODUCTS CO Inc
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Filing: 1972-12-26
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Granted: 1975-02-18
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Expires: 1992-12-26
Abstract
Abstract A centering and guiding log feeding device including oppositely disposed, readily compressible, resilient rollers between which logs are passed as they are fed into a sawing apparatus. In the overall sawing system, one device is positioned ahead of a scragg saw which cuts a log into a cant having two opposite, flat sides. Another centering and guide device is positioned ahead of a gang edger and downstream from the scragg saw and centers, and guides the cant received from the scragg saw into the gang edger where the cant is cut into usable boards.
Inventors
- 👤 Harold J Sweet
- 👤 Jr John G Grimm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:42
CPC Classifications
B; B27; B27B; B27B25/00; B27B25/02
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
143 words
A device for centering moving logs or the like as they are fed into a sawing apparatus or the like, said device comprising: a supporting frame; at least one pair of generally oppositely disposed pivot arms, each pivotally mounted on said frame; a readily compressible, resilient roller for each said pivot arm, rotatably mounted on said pivot arm at a point spaced from the pivot point of said pivot arm whereby said readily compressible, resilient rollers are pivotable towards and away from one another; bias means operably connecting said pivot arm and said frame to thereby bias said rollers to pivotable movement towards one another whereby when a log passes between said rollers, said rollers compress individually and pivot away from one another to absorb irregularities in a log or the like while still holding said log or the like generally centered therebetween.
Claim 2
Independent Claim
143 words
A device for centering moving logs or the like as they are fed into a sawing apparatus or the like, said device comprising: a supporting frame; at least one pair of generally oppositely disposed pivot arms, each pivotally mounted on said frame; a readily compressible, resilient roller for each said pivot arm, rotatably mounted on said pivot arm at a point spaced from the pivot point of said pivot arm whereby said readily compressible, resilient rollers are pivotable towards and away from one another; bias means operably connecting said pivot arm and said frame to thereby bias said rollers to pivotable movement towards one another whereby when a log passes between said rollers, said rollers compress individually and pivot away from one another to absorb irregularities in a log or the like while still holding said log or the like generally centered therebetween.
Claim 3
Dependent Claim
40 words
The device of claim 1 in which said bias means is operably connected to said pivot arm at a point spaced from its pivot point and on the opposite side of said pivot point from said readily compressible, resilient roller.
Claim 4
Dependent Claim
14 words
The device of claim 1 in which said bias means comprises an air spring.
Claim 5
Dependent Claim
19 words
The device of claim 3 in which said air spring is filled to a pressure of approximately five pounds.
Claim 6
Dependent Claim
47 words
The device of claim 3 in which each said air spring includes means for varying the air pressure therein to increase or decrease the extent to which said rollers can be pivoted away from one another whereby said device can be adjusted to accommodate differing sized logs.
Claim 7
Dependent Claim
76 words
The device of claim 3 in which a number of pairs of said pivot arms and said rollers are spaced along the path followed by a log as it is fed into a sawing apparatus or the like, said pairs of pivot arms and rollers extending for a distance approximately equal to the length of a log being passed therethrough whereby the entire length of the log is controlled as the log enters a sawing apparatus.
Claim 8
Dependent Claim
44 words
The device of claim 3 in which said readily compressible, resilient rollers comprise hollow, air-filled members filled with air to a pressure just sufficient to inflate said hollow members and cause them to hold their shape until engaged by a log or the like.
Claim 9
Dependent Claim
61 words
The device of claim 7 in which said hOllow, air-filled rollers are filled to a pressure of approximately 1 1/2 pounds; each said air spring including means for varying the air pressure therein to increase or decrease the extent to which said rollers can be pivoted away from one another whereby said device can be adjusted to accommodate differing sized logs.
Claim 10
Dependent Claim
19 words
The device of claim 8 in which said air spring is filled to a pressure of approximately 5 pounds.
Claim 11
Dependent Claim
78 words
The device of claim 1 in which one pair of said readily compressible, resilient rollers are rotatably driven the rest of said rollers being freely rotatable; said driven rollers being positioned ahead of said freely rotatable rollers for driving a log through said freely rotatable rollers and into a sawing apparatus or the like; a motor mounted on each pivot arm carrying a driven roller, said motor being operably connected to said driven roller for driving the same.
Claim 12
Dependent Claim
29 words
The device of claim 1 in which said bias means includes means for varying the bias strength thereof whereby said device can be adjusted to accommodate differing sized logs.
Claim 13
Independent Claim
193 words
A device for sawing logs or the like comprising: a first sawing apparatus for sawing a log into a cant having two opposite flat sides; a first centering and guiding device for centering logs as they are moved into said first sawing apparatus, said centering device including at least two readily compressible, resilient rollers spaced on opposite sides of a path which is centered with respect to said first sawing apparatus, said centering and guiding device comprising the final guide means which control said log as it passes into said sawing apparatus; a second sawing apparatus for sawing said cant into boards; a second centering device positioned behind said first sawing apparatus and ahead of said second sawing apparatus for centering and guiding said cants as they are moved into said second sawing apparatus, said second centering and guiding device comprising at least two oppositely disposed, readily compressible, resilient rollers spaced on opposite sides of a path which is centered with respect to said second sawing apparatus, said second centering and guiding device comprising the final guide means which controls the centering of a log as it passes into said second sawing apparatus.
Claim 14
Independent Claim
193 words
A device for sawing logs or the like comprising: a first sawing apparatus for sawing a log into a cant having two opposite flat sides; a first centering and guiding device for centering logs as they are moved into said first sawing apparatus, said centering device including at least two readily compressible, resilient rollers spaced on opposite sides of a path which is centered with respect to said first sawing apparatus, said centering and guiding device comprising the final guide means which control said log as it passes into said sawing apparatus; a second sawing apparatus for sawing said cant into boards; a second centering device positioned behind said first sawing apparatus and ahead of said second sawing apparatus for centering and guiding said cants as they are moved into said second sawing apparatus, said second centering and guiding device comprising at least two oppositely disposed, readily compressible, resilient rollers spaced on opposite sides of a path which is centered with respect to said second sawing apparatus, said second centering and guiding device comprising the final guide means which controls the centering of a log as it passes into said second sawing apparatus.
Claim 15
Dependent Claim
99 words
The device of claim 12 in which said second centering and guiding device includes a plurality of driven feed rollers positioned ahead of said readily compressible, resilient rollers, a straight, generally flat guide positioned above said feed rollers; said feed rollers being disposed at an angle to said guide so that said feed rollers drive said cant into said guide and cause it to roll over onto a flat side such that the unsawed, rough sides of said cant are engaged by said readily compressible, resilient rollers of said second centering and guiding device as said cant passes therethrough.
Claim 16
Dependent Claim
44 words
The device of claim 13 which includes a driven wheel positioned above said driven feed rollers and immediately ahead of said readily compressible, resilient rollers whereby said cant is engaged by said wheel and driven thereby into position between said readily compressible, resilient rollers.
Claim 17
Dependent Claim
73 words
The device of claim 13 in which each said centering and guiding device comprises: a number of pairs of said readily compressible, resilient rollers spaced along the path followed by a log as it is fed into a sawing apparatus, said pairs of rollers extending for a distance approximately equal to the length of a log whereby the entire length of a log is controlled as it begins to enter a sawing apparatus.
Claim 18
Dependent Claim
62 words
The device of claim 15 in which said second centering and guiding device includes means for rotating at least one pair of said compressible, resilient rollers, the rest of said rollers being freely rotatable, said driven rollers being positioned ahead of said freewheeling rollers whereby said driven rollers drive said cant through said freely rotatable rollers and into said second sawing apparatus.
Claim 19
Dependent Claim
46 words
The deVice of claim 16 in which said first centering and guiding device in which all of said readily compressible, resilient rollers are freely rotatably mounted, said first centering and guiding device including a drive chain passing generally between said rollers for driving a log therebetween.
Claim 20
Dependent Claim
73 words
The device of claim 12 in which each said centering and guiding device comprises: a number of pairs of said readily compressible, resilient rollers spaced along the path followed by a log as it is fed into a sawing apparatus, said pairs of rollers extending for a distance approximately equal to the length of a log whereby the entire length of a log is controlled as it begins to enter a sawing apparatus.
Claim 21
Dependent Claim
63 words
The device of claim 18 in which said second centering and guiding device includes means for rotating at least one pair of said readily compressible, resilient rollers, the rest of said rollers being freely rotatable, said driven rollers being positioned ahead of said freewheeling rollers whereby said driven rollers drive said cant through said freely rotatable rollers and into said second sawing apparatus.
Claim 22
Dependent Claim
46 words
The device of claim 19 in which said first centering and guiding device in which all of said readily compressible, resilient rollers are freely rotatably mounted, said first centering and guiding device including a drive chain passing generally between said rollers for driving a log therebetween.
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |