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US3741060A
Expired / Lapsed
US
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Trimming foam laminates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-05-18
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Granted: 1973-06-26
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Expires: 1991-05-18
Abstract
Abstract Apparatus for trimming a rigid polyurethane foam laminate comprising a frame freely movable laterally, a pair of carriages clamped to the frame a preselected distance apart and movable with the frame, cutting means mounted upon each carriage and movable therewith, each cutting means being mounted upon its respective carriage a preselected distance from the other and from the adjacent longitudinal edge of the laminate, means for continuously sensing lateral movement of the laminate and means responsive to lateral movement of the laminate for causing corresponding lateral movement of the frame, the carriages and their respective cutting means.
Inventors
- 👤 I Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:41
CPC Classifications
B; B26; B26D; B26D1/00; B26D1/01; B26D1/02; B26D1/03; B29; B29C; B29C44/00; B29C44/34; B29C44/56; Y; Y10; Y10T; Y10T83/00; Y10T83/525; Y10T83/538; Y10T83/647; Y10T83/6584; Y10T83/6592; Y10T83/6595; Y10T83/6603; Y10T83/768; Y10T83/7809; Y10T83/7847
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
219 words
Apparatus for trimming a foam laminate of the kind comprising a layer of a rigid foamed synthetic plastics material sandwiched between and bonded to an upper easily-cut flexible sheet and a lower easily-cut flexible carrier sheet, said apparatus comprising a frame freely movable laterally with respect to the longitudinal direction of travel of the carrier sheet, a pair of carriages adapted to be clamped to the frame at a preselected distance apart and movable with the frame, cutting means mounted upon each carriage and movable therewith, each cutting means being mounted upon its respective carriage at a preselected distance from the other and from the adjacent longitudinal edGe of the carrier sheet, sensing means for continuously sensing lateral movement of the carrier sheet comprising a sensing arm spring-loaded against a longitudinal lower edge of the laminate, the sensing arm being movable therewith and being adapted to detect and measure transverse movement of the laminate, and a pheumatic position control system for laterally moving the frame, carriages and cutting means responsive to movement of the sensing means comprising a closed-loop control system having a positioner connected to one side of a double-acting pheumatic cylinder, the other side of the double-acting cylinder being connected to a regulator, and the regulator being connected back to the positioner to provide a feed-back system.
Claim 2
Dependent Claim
219 words
Apparatus for trimming a foam laminate of the kind comprising a layer of a rigid foamed synthetic plastics material sandwiched between and bonded to an upper easily-cut flexible sheet and a lower easily-cut flexible carrier sheet, said apparatus comprising a frame freely movable laterally with respect to the longitudinal direction of travel of the carrier sheet, a pair of carriages adapted to be clamped to the frame at a preselected distance apart and movable with the frame, cutting means mounted upon each carriage and movable therewith, each cutting means being mounted upon its respective carriage at a preselected distance from the other and from the adjacent longitudinal edGe of the carrier sheet, sensing means for continuously sensing lateral movement of the carrier sheet comprising a sensing arm spring-loaded against a longitudinal lower edge of the laminate, the sensing arm being movable therewith and being adapted to detect and measure transverse movement of the laminate, and a pheumatic position control system for laterally moving the frame, carriages and cutting means responsive to movement of the sensing means comprising a closed-loop control system having a positioner connected to one side of a double-acting pheumatic cylinder, the other side of the double-acting cylinder being connected to a regulator, and the regulator being connected back to the positioner to provide a feed-back system.
Claim 3
Dependent Claim
232 words
Apparatus for trimming a foam laminate of the kind comprising a layer of a rigid foamed synthetic plastics material sandwiched between and bonded to an upper easily-cut flexible sheet and a lower facing which is profiled, said apparatus comprising a frame freely movable laterally with respect to the longitudinal direction of travel of the lower facing, a pair of carriages adapted to be clamped to the frame at a preselected distance apart and movable with the frame, cutting means mounted upon each carraige and movable therewith, each cutting means being mounted upon its respective carriage at a preselected distance from the other and in registration with the adjacent longitudinal edge of the lower facing, sensing means comprising a spring loaded arm for continuously sensing lateral movement of the lower facing, a wheel adapted to engage the profile of the lower facing connected to the sensing means to track and move laterally with the profile and to indicate to the sensing means lateral movement of the lower facing, and a pneumatic position control system for laterally moving the frame, carriages and cutting means responsive to movement of the sensing means comprising a closed-loop control system having a positioner connected to one side of a double-acting pneumatic cylinder, the other side of the double-acting cylinder being connected to a regulator, and the regulator being connected back to the positioner to provide a feed-back system.
Claim 4
Dependent Claim
232 words
Apparatus for trimming a foam laminate of the kind comprising a layer of a rigid foamed synthetic plastics material sandwiched between and bonded to an upper easily-cut flexible sheet and a lower facing which is profiled, said apparatus comprising a frame freely movable laterally with respect to the longitudinal direction of travel of the lower facing, a pair of carriages adapted to be clamped to the frame at a preselected distance apart and movable with the frame, cutting means mounted upon each carraige and movable therewith, each cutting means being mounted upon its respective carriage at a preselected distance from the other and in registration with the adjacent longitudinal edge of the lower facing, sensing means comprising a spring loaded arm for continuously sensing lateral movement of the lower facing, a wheel adapted to engage the profile of the lower facing connected to the sensing means to track and move laterally with the profile and to indicate to the sensing means lateral movement of the lower facing, and a pneumatic position control system for laterally moving the frame, carriages and cutting means responsive to movement of the sensing means comprising a closed-loop control system having a positioner connected to one side of a double-acting pneumatic cylinder, the other side of the double-acting cylinder being connected to a regulator, and the regulator being connected back to the positioner to provide a feed-back system.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |