US3715027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for correcting the deflection of a large wide endless belt
Assignee: Ricoh Co Ltd
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Filing: 1970-12-08
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Granted: 1973-02-06
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Expires: 1990-12-08
Abstract
Abstract An endless belt is trained over at least a pair of rollers, including at least one driven roller, and one of the other rollers is mounted for swinging about a pivot axis perpendicular to its axis of rotation. A pair of belt deflection detecting rollers are rotatably mounted adjacent respective opposite side edges of the belt and are spaced apart a distance slightly greater than the width of the belt so as normally to be out of engagement with the adjacent belt side edge. The detecting rollers are operatably connected to the mounting means for the swingable roller and are operable, responsive to rotation of the detecting roller by engagement with a belt side edge as a result of belt deflection, to swing the swingable roller about the pivot axis thereof in a direction to correct belt deflection.
Inventors
- 👤 S Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:38
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/10; B65G39/12; B65G39/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
152 words
A belt deflection correction device for a very wide endless belt trained over at least a pair of rollers, at least one of which is coupled to belt driving means, said device comprising, in combination, means mounting one of said rollers for swinging about a stationary pivot axis perpendicular to its axis of rotation; a pair of belt deflection detecting rollers rotatably mounted on immobile axes adjacent opposite side edges of said belt and spaced apart a distance slightly greater than the width of said belt so as normally to be out of engagement with the side edges of said belt; and means operatively connecting said detecting rollers to said one roller and operable, responsive solely to rotation of a detecting roller by engagement with a belt side edge as a result of belt deflection, to swing said one roller about said pivot axis in a direction to correct the belt deflection.
Claim 2
Dependent Claim
152 words
A belt deflection correction device for a very wide endless belt trained over at least a pair of rollers, at least one of which is coupled to belt driving means, said device comprising, in combination, means mounting one of said rollers for swinging about a stationary pivot axis perpendicular to its axis of rotation; a pair of belt deflection detecting rollers rotatably mounted on immobile axes adjacent opposite side edges of said belt and spaced apart a distance slightly greater than the width of said belt so as normally to be out of engagement with the side edges of said belt; and means operatively connecting said detecting rollers to said one roller and operable, responsive solely to rotation of a detecting roller by engagement with a belt side edge as a result of belt deflection, to swing said one roller about said pivot axis in a direction to correct the belt deflection.
Claim 3
Dependent Claim
152 words
A belt deflection correction device for a very wide endless belt trained over at least a pair of rollers, at least one of which is coupled to belt driving means, said device comprising, in combination, means mounting one of said rollers for swinging about a stationary pivot axis perpendicular to its axis of rotation; a pair of belt deflection detecting rollers rotatably mounted on immobile axes adjacent opposite side edges of said belt and spaced apart a distance slightly greater than the width of said belt so as normally to be out of engagement with the side edges of said belt; and means operatively connecting said detecting rollers to said one roller and operable, responsive solely to rotation of a detecting roller by engagement with a belt side edge as a result of belt deflection, to swing said one roller about said pivot axis in a direction to correct the belt deflection.
Claim 4
Dependent Claim
152 words
A belt deflection correction device for a very wide endless belt trained over at least a pair of rollers, at least one of which is coupled to belt driving means, said device comprising, in combination, means mounting one of said rollers for swinging about a stationary pivot axis perpendicular to its axis of rotation; a pair of belt deflection detecting rollers rotatably mounted on immobile axes adjacent opposite side edges of said belt and spaced apart a distance slightly greater than the width of said belt so as normally to be out of engagement with the side edges of said belt; and means operatively connecting said detecting rollers to said one roller and operable, responsive solely to rotation of a detecting roller by engagement with a belt side edge as a result of belt deflection, to swing said one roller about said pivot axis in a direction to correct the belt deflection.
Claim 5
Dependent Claim
45 words
A belt deflection correction device, as claimed in claim 1, in which said means mounting one of said rollers comprises a bracket rotatably supporting said one roller and mounted for swinging about said pivot axis; said connecting means connecting said detecting rollers to said bracket.
Claim 6
Dependent Claim
69 words
A belt deflection correction device, as claimed in claim 1, in which said means mounting one of said rollers comprises a shaft extending through said one roller; and a spherical antifriction bearing engaged between a mid portion of said shaft and a mid portion of said roller; said connecting means comprises a swingably mounted bracket having means at its opposite ends engaged with opposite ends of said one roller.
Claim 7
Dependent Claim
67 words
A belt deflection correction device, as claimed in claim 1, in which said connecting means comprises respective belt roller push-back members rotatable with said belt deflection detecting rollers and operable, responsive to rotation of the associated detecting roller by engagement with a belt side edge, to engage said one belt-supporting roller to swing the latter about said pivot axis in a direction to correct the belt deflection.
Claim 8
Dependent Claim
23 words
A belt deflection correction device, as claimed in claim 4, including respective brake means each operatively associated with a belt deflection detecting roller.
Claim 9
Dependent Claim
24 words
A belt deflection correction device, as claimed in claim 5, in which each brake means is directly engageable with the associated deflection detecting roller.
Claim 10
Dependent Claim
87 words
A belt deflection correction device, as claimed in claim 6, in which each brake means comprises a brake band secured at one end to a fixed point and at the opposite end to the adjacent end of a roller supporting bracket constituting said mounting means; each brake band being tensioned, to engage the associated deflection detecting roller, responsive to engagement of the associated push-back member with said one belt supporting roller to swing the latter about said pivot axis in a direction to correct the belt deflection.
Claim 11
Dependent Claim
84 words
A belt deflection correction device, as claimed in claim 5, in which each brake means comprises a brake member secured to the adjacent end of a bracket supporting said one roller and swingable about said pivot axis; each brake member responsive to engagement of the associated push-back member with said one belt-supporting roller, to swing said one roller about said pivot axis, being moved to a position in which an end abutment thereof is in the path of movement of the associated push-back member.
Claim 12
Dependent Claim
59 words
A belt deflection correction device, as claimed in claim 4, in which each belt roller push-back member is positioned adjacent said one belt-supporting roller and is rotatable about an axis spaced from the axis of rotation of the associated belt deflection detecting roller; and belt and pulley means interconnecting each belt deflection detecting roller to the associated push-back member.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |