US3782044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide abrasive belt type lumber planing machine
Assignee: Timesavers Inc
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Filing: 1972-05-01
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Granted: 1974-01-01
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Expires: 1992-05-01
Abstract
Abstract A wide abrasive belt lumber planing machine in which the planing action is performed by a contact drum-supported abrasive belt as the workpiece is moved through the machine, with its top surface in contact with the belt. An in-feed pressure shoe and an outfeed pressure shoe press down on the workpiece just as it enters and leaves the abrasion zone, and to preclude the generation of abnormally high friction loads due to variations in thickness of the workpiece, the force with which the in-feed shoe is pressed down is produced by a pressure-regulated air cylinder.
Inventors
- 👤 P Olin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
B; B24; B24B; B24B21/00; B24B21/04; B24B21/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
254 words
A wide abrasive belt lumber planing machine having a frame, a contact drum rotatably mounted in the frame, a conveyor belt that has a horizontally extending working stretch which is solidly supported by frame carried means including a platen beneath the contact drum, and by which workpieces are carried under the drum to be abraded by an orbitally moving abrasive belt trained around it, and power drive means for the conveyor belt, said machine also having a pressure shoe near the contact drum, a portion of which engages workpieces to confine them tightly against the conveyor belt directly before they are engaged by the abrasive belt, said machine being characterized by: A. means mounting the pressure shoe on the machine frame for rocking movement about a horizontal axis transverse to the direction workpieces are carried through the machine by said conveyor belt, whereby the workpiece engaging portion of the shoe can move arcuately up and down; B. pneumatic force-applying means fixedly mounted on the machine frame at a level above the pressure shoe and having a plunger which is movable substantially horizontally; C. a rigid arm projecting upwardly from the pressure shoe and constrained to rock therewith, said arm having a pad which is engaged by said plunger whereby the plunger transmits to the pressure shoe the force which is applied by the pneumatic force-applying means; and D. means including a pressure regulating valve for supplying compressed air to said pneumatic force-applying means in such manner that the force produced thereby remains substantially constant.
Claim 2
Dependent Claim
254 words
A wide abrasive belt lumber planing machine having a frame, a contact drum rotatably mounted in the frame, a conveyor belt that has a horizontally extending working stretch which is solidly supported by frame carried means including a platen beneath the contact drum, and by which workpieces are carried under the drum to be abraded by an orbitally moving abrasive belt trained around it, and power drive means for the conveyor belt, said machine also having a pressure shoe near the contact drum, a portion of which engages workpieces to confine them tightly against the conveyor belt directly before they are engaged by the abrasive belt, said machine being characterized by: A. means mounting the pressure shoe on the machine frame for rocking movement about a horizontal axis transverse to the direction workpieces are carried through the machine by said conveyor belt, whereby the workpiece engaging portion of the shoe can move arcuately up and down; B. pneumatic force-applying means fixedly mounted on the machine frame at a level above the pressure shoe and having a plunger which is movable substantially horizontally; C. a rigid arm projecting upwardly from the pressure shoe and constrained to rock therewith, said arm having a pad which is engaged by said plunger whereby the plunger transmits to the pressure shoe the force which is applied by the pneumatic force-applying means; and D. means including a pressure regulating valve for supplying compressed air to said pneumatic force-applying means in such manner that the force produced thereby remains substantially constant.
Claim 3
Dependent Claim
230 words
A wide abrasive belt lumber planing machine having a frame, a contact drum rotatably mounted in the frame, a conveyor belt that has a horizontally extending working stretch which is solidly supported by frame carried means including a platen beneath the contact drum, and by which workpieces are carried under the drum to be abraded by an orbitally moving abrasive belt trained around it, and power drive means for the conveyor belt, said machine also having a pressure shoe near the contact drum, a portion of which engages workpieces to confine them tightly against the conveyor belt directly before they are engaged by the abrasive belt, said machine being characterized by: A. means mounting the pressure shoe on the machine frame for rocking movement about a horizontal axis transverse to the direction workpieces are carried through the machine by the conveyor belt, with the work engaging portion thereof spaced from said horizontal axis and located closely adjacent to the lowermost portion of the contact drum to move arcuately up and down and hold a workpiece down on the conveyor belt; and B. pneumatic biasing means acting on the pressure shoe in a direCtion to urge its workpiece engaging portion downward towards the conveyor belt with a yielding force that remains constant irrespective of the distance between said portion of the shoe and the conveyor belt, said pneumatic biasing means comprising
Claim 4
Dependent Claim
230 words
A wide abrasive belt lumber planing machine having a frame, a contact drum rotatably mounted in the frame, a conveyor belt that has a horizontally extending working stretch which is solidly supported by frame carried means including a platen beneath the contact drum, and by which workpieces are carried under the drum to be abraded by an orbitally moving abrasive belt trained around it, and power drive means for the conveyor belt, said machine also having a pressure shoe near the contact drum, a portion of which engages workpieces to confine them tightly against the conveyor belt directly before they are engaged by the abrasive belt, said machine being characterized by: A. means mounting the pressure shoe on the machine frame for rocking movement about a horizontal axis transverse to the direction workpieces are carried through the machine by the conveyor belt, with the work engaging portion thereof spaced from said horizontal axis and located closely adjacent to the lowermost portion of the contact drum to move arcuately up and down and hold a workpiece down on the conveyor belt; and B. pneumatic biasing means acting on the pressure shoe in a direCtion to urge its workpiece engaging portion downward towards the conveyor belt with a yielding force that remains constant irrespective of the distance between said portion of the shoe and the conveyor belt, said pneumatic biasing means comprising
Claim 5
Dependent Claim
61 words
an arm fixed with respect to the pressure shoe and projecting upwardly from said horizontal axis about which the pressure shoe rocks, said plunger bearing against said arm whereby pressure in the pneumatic cylinder forces the work engaging portion of the pressure shoe downward; and C. a pressure regulating valve through which air under pressure is supplied to the air cylinder.
Claim 6
Dependent Claim
61 words
an arm fixed with respect to the pressure shoe and projecting upwardly from said horizontal axis about which the pressure shoe rocks, said plunger bearing against said arm whereby pressure in the pneumatic cylinder forces the work engaging portion of the pressure shoe downward; and C. a pressure regulating valve through which air under pressure is supplied to the air cylinder.
Claim 7
Dependent Claim
126 words
The machine of claim 2, wherein said means that rockably mounts the pressure shoe on the machine frame includes a shaft extending across the machine with its end portions journalled in bearings in the machine frame, and on which the pressure shoe is rockably supported, and further characterized by: A. a hold-down roll to hold workpieces down on the conveyor belt as they approach the pressure shoe; B. a pair of arms rockably mounted on said shaft and projecting substantially horizontally therefrom and upstream of the work advancing travel of the conveyor belt, said pair of arms having the hold-down roll journalled therein; and C. biasing means reacting between each of said pair of arms and the machine frame to yieldingly force the hold-down roll downward.
Claim 8
Dependent Claim
45 words
The machine of claim 1, further characterized by: lost motion connection means connected between said rigid arm and a part fixed with respect to the frame of the machine for defining a limit of downward motion of the workpiece engaging portion of the pressure shoe.
Claim 9
Dependent Claim
37 words
The machine of claim 1, further characterized by: said means for rockably mounting the pressure shoe including an eccentric, rotation of which provides for up and down adjustment of the axis about which the pressure shoe rocks.
Claim 10
Dependent Claim
177 words
The machine of claim 5, wherein: A. said means for rockably mounting the pressure shoe comprises a cross shaft supported at its opposite ends from fixed parts of the machine, and having the shoe rotatably mounted thereon with its workpiece engaging portion spaced horizontally in one direction from the cross shaft; and further characterized by: B. a pair of roll carrying arms also mounted on said cross shaft for swinging motion about the shaft and for bodily up and down adjusting motion, said roll carrying arms extending horizontaly from the shaft in the direction away from the workpiece engaging portion of the shoe; C. a roll freely rotatably mounted on the free end portion of said arms for bodily up and down movement with swinging motion of said arms; D. spring means reacting between the roll carrying arms and the machine frame to bias the roll carrying arms downwardly; and E. motion limiting means connected between the machine frame and the said arms for maintaining said roll at not less than a predetermined distance above the platen.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |