US3688356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wad or plug control for stuffer-box crimping apparatus
Assignee: TMM Research Ltd
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Filing: 1970-03-10
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Granted: 1972-09-05
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Expires: 1990-03-10
Abstract
Abstract A variable drive for controlling the relative speeds at which textile material is fed to and is withdrawn from the chamber of a stuffer crimper. A member senses the level of the core of crimped yarn within the chamber and actuates fluid operated control mechanism to vary the drive ratio so as to maintain the core at a desired level in the stuffer crimper.
Inventors
- 👤 Hector Scowcroft
- 👤 Albert J Cartlidge
- 👤 Frank Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:03
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; D02G1/125
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
375 words
Stuffer-box crimping apparatus comprising: a stuffing chamber; feed means for feeding material to be crimped into one end of the stuffing chamber; delivery means for delivering crimped material from the other end of the chamber; control means comprising a movable member disposed within the chamber for controlling the relative speeds at which the material is fed to the chamber and is withdrawn from the chamber to control the position of the head of the wad of the material in the chamber, said movable member being movable in response to movement of the head of the wad of the material in the stuffing chamber; and a fluid-operated control mechanism operably connected to said movable member, said control mechanism being operable in response to movement of said movable member in one direction to adjust the relative speeds of the feed means and delivery means to cause an advancement of the head of the wad of the material in the stuffing chamber, and being also operable in response to movement of the movable member in the opposite direction to adjust the relative speeds of the feed means and delivery means to cause a retraction of the head of the wad of the material in the stuffing chamber; said fluid-operated control mechanism comprising a variable speed drive unit having a variable speed output element drivingly connected to at least one of said feed means and delivery means and a control input for varying the speed thereof, a pneumatically operated actuator including a movable element operably connected to said control input and movable in one direction in response to a change in pressure of air applied to a first inlet thereof and movable in an opposite direction in response to a change in pressure of air applied to a second inlet thereof, a first auxiliary control valve for directing air under pressure to said first inlet of said pneumatically operated actuator, a second auxiliary control valve for directing air under pressure to said second inlet of said pneumatically operated actuator, and a switching valve operably connected to the movable member and connected to said auxiliary valves for operating the latter, whereby movement of said movable member is effective to vary the relative speeds of said feed means and delivery means.
Claim 2
Dependent Claim
375 words
Stuffer-box crimping apparatus comprising: a stuffing chamber; feed means for feeding material to be crimped into one end of the stuffing chamber; delivery means for delivering crimped material from the other end of the chamber; control means comprising a movable member disposed within the chamber for controlling the relative speeds at which the material is fed to the chamber and is withdrawn from the chamber to control the position of the head of the wad of the material in the chamber, said movable member being movable in response to movement of the head of the wad of the material in the stuffing chamber; and a fluid-operated control mechanism operably connected to said movable member, said control mechanism being operable in response to movement of said movable member in one direction to adjust the relative speeds of the feed means and delivery means to cause an advancement of the head of the wad of the material in the stuffing chamber, and being also operable in response to movement of the movable member in the opposite direction to adjust the relative speeds of the feed means and delivery means to cause a retraction of the head of the wad of the material in the stuffing chamber; said fluid-operated control mechanism comprising a variable speed drive unit having a variable speed output element drivingly connected to at least one of said feed means and delivery means and a control input for varying the speed thereof, a pneumatically operated actuator including a movable element operably connected to said control input and movable in one direction in response to a change in pressure of air applied to a first inlet thereof and movable in an opposite direction in response to a change in pressure of air applied to a second inlet thereof, a first auxiliary control valve for directing air under pressure to said first inlet of said pneumatically operated actuator, a second auxiliary control valve for directing air under pressure to said second inlet of said pneumatically operated actuator, and a switching valve operably connected to the movable member and connected to said auxiliary valves for operating the latter, whereby movement of said movable member is effective to vary the relative speeds of said feed means and delivery means.
Claim 3
Dependent Claim
65 words
Apparatus according to claim 1 wherein said switching valve is operable to immobilize said movable element by operating the auxiliary valves to simultaneously apply air under pressure to both said first and second inlets, said switching valve being operable to actuate either auxiliary control valve to connect the corresponding one of said inLets to the atmosphere therethrough, whereby movement of said movable element is accomplished.
Claim 4
Dependent Claim
41 words
Apparatus according to claim 2 wherein said auxiliary valves include adjustment means for varying the rate at which air passes therethrough from said inlets to thereby vary the rate of change of relative speeds of said feed means and delivery means.
Claim 5
Dependent Claim
146 words
Apparatus according to claim 2 wherein said switching valve includes a movable control element, there being shaft means operably interconnecting said movable member and said movable control element for moving the latter toward a first position in response to movement of said movable member in said one direction and for moving the movable control element toward a second position in response to movement of said movable member in said opposite direction, said auxiliary control valves each having a control air pressure supply conduit, said movable control element including aperture means disposed for alignment with one of said supply conduits when said control element is in its first position and for alignment with the other of said supply conduits when said control element is in its second position whereby to selectively operate said auxiliary control valves in response to movement of said movable member in corresponding directions.
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |