US3655310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hose pipes
Assignee: George Angus and Co Ltd
•
Filing: 1969-06-30
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Granted: 1972-04-11
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Expires: 1989-06-30
Abstract
Abstract The invention provides mechanism for feeding a textile jacket along a rearward extension of the mandrel of an extrusion head which applies to the jacket a cover and a lining of rubber or plastics material, said mechanism including two spaced clamps which are operable alternately to clamp the jacket to the mandrel extension and to hold the latter against forward movement, two feed mechanisms one of which operates while the front clamp is engaged to feed the portion of the jacket between the clamps forwardly along the mandrel extension, and the other of which operates while the rear clamp is engaged to feed forwardly along the mandrel extension the portion of the jacket in advance of the clamps and an automatic control circuit for effecting sequential operation of the clamps and the feed mechanisms.
Inventors
- 👤 Brian Lawrence Smith
- 👤 Rodger William Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/15; B29C48/151; B29C48/152; B29C48/153; B29C48/25; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92514; B29C2948/92609; B29C2948/92657; B29C2948/92819; B29C2948/92942; B29C2948/92971; B29C48/03; B29C48/09
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
208 words
Apparatus for applying rubber or plastics material to a tubular textile jacket comprising, in combination with an extrusion head, a rod external to the extrusion head and constituting an extension of a mandrel within said extrusion head, said rod affording support for a reserve of jacket disposed in corrugated formation about said rod, front and rear clamps, means for engaging said clamps alternately to clamp the jacket to said rod at respective forward and rearward locations and to hold the rod against forward movement towards said extrusion head and for opening each clamp in response to engagement of the other clamp, two feed mechanisms, means for operating one feed mechanism while the front clamp is engaged to cause said one feed mechanism to engage and feed the portion of the jacket rearward of the front clamp forwardly along said rod, means for operating the other feed mechanism while the rear clamp is engaged to cause said other feed mechanism to engage and feed forwardly along said rod, without overlapping movement of said feed mechanisms, the portion of the jacket in advance of the rear clamp, and an automatic control circuit for effecting sequential operation of said clamp opening and engaging means and of said feed mechanism operating means.
Claim 2
Dependent Claim
208 words
Apparatus for applying rubber or plastics material to a tubular textile jacket comprising, in combination with an extrusion head, a rod external to the extrusion head and constituting an extension of a mandrel within said extrusion head, said rod affording support for a reserve of jacket disposed in corrugated formation about said rod, front and rear clamps, means for engaging said clamps alternately to clamp the jacket to said rod at respective forward and rearward locations and to hold the rod against forward movement towards said extrusion head and for opening each clamp in response to engagement of the other clamp, two feed mechanisms, means for operating one feed mechanism while the front clamp is engaged to cause said one feed mechanism to engage and feed the portion of the jacket rearward of the front clamp forwardly along said rod, means for operating the other feed mechanism while the rear clamp is engaged to cause said other feed mechanism to engage and feed forwardly along said rod, without overlapping movement of said feed mechanisms, the portion of the jacket in advance of the rear clamp, and an automatic control circuit for effecting sequential operation of said clamp opening and engaging means and of said feed mechanism operating means.
Claim 3
Dependent Claim
54 words
Apparatus as claimed in claim 1, in which said clamp opening and engaging means includes a switch and a timer associated with each clamp, each switch being actuated upon engagement of a clamp to cause its timer to open the other clamp immediately and close said other clamp again after a predetermined time interval.
Claim 4
Dependent Claim
58 words
Apparatus as claimed in claim 2, in which said clamp opening and engaging means includes, for each clamp, a fluid pressure cylinder for moving said clamp between its open and its engaged positions and a solenoid operated valve controLling said pressure cylinder, the solenoid associated with each clamp being responsive to the timer associated with the other clamp.
Claim 5
Dependent Claim
71 words
Apparatus as claimed in claim 1, in which each feed mechanism operating means includes a fluid pressure cylinder for applying a block to the jacket and another fluid pressure cylinder for advancing the block to feed the jacket along the rod and a control valve for the cylinders which is operated to render the feed mechanism effective on the jacket in response to opening of an associated one of the clamps.
Claim 6
Dependent Claim
25 words
Apparatus as claimed in claim 1, wherein said rod carries spaced stops which cooperate respectively with said clamps to hold said rod against forward movement.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |