US3590422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for providing constant inflation air
Assignee: Union Carbide Corp
•
Filing: 1969-02-07
•
Granted: 1971-07-06
•
Expires: 1989-02-07
Abstract
Abstract The shirring mandrel of a shirring apparatus is provided with ports and is adapted to house within its bore a reciprocating valve assembly which serves to alternately open and close the mandrel ports thereby permitting inflation air to be constantly supplied to and through the mandrel ports to and through the mandrel bore without interruption.
Inventors
- 👤 Edward Andrew Matecki
- 👤 Verner Edwin Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:31
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
An apparatus for constantly and continuously supplying inflation air to a continuous length of constantly advancing tubular material comprising, in combination; a. a hollow mandrel having an internal bore therethrough and floating support means; b. a rear mandrel port and a forward mandrel port formed in said mandrel in a spaced-apart relationship from each other, said rear and forward mandrel ports each communicating with the internal bore of said mandrel; c. a valve assembly slideably positioned within the bore of said mandrel; d. means for reciprocating said valve assembly such that said rear and forward mandrel ports are alternately opened and closed; e. means for constantly advancing a continuous length of tubular material along and about said mandrel; and f. means for continuously and constantly supplying inflation air through said alternately opened rear and forward mandrel ports such that inflation air is continuously supplied through the bore of said mandrel into the constantly advancing continuous length of tubular material.
Claim 2
Independent Claim
159 words
An apparatus for constantly and continuously supplying inflation air to a continuous length of constantly advancing tubular material comprising, in combination; a. a hollow mandrel having an internal bore therethrough and floating support means; b. a rear mandrel port and a forward mandrel port formed in said mandrel in a spaced-apart relationship from each other, said rear and forward mandrel ports each communicating with the internal bore of said mandrel; c. a valve assembly slideably positioned within the bore of said mandrel; d. means for reciprocating said valve assembly such that said rear and forward mandrel ports are alternately opened and closed; e. means for constantly advancing a continuous length of tubular material along and about said mandrel; and f. means for continuously and constantly supplying inflation air through said alternately opened rear and forward mandrel ports such that inflation air is continuously supplied through the bore of said mandrel into the constantly advancing continuous length of tubular material.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 wherein the valve assembly comprises, in combination; a. a tubular, hollow, cylindrical forward valve member; b. a solid, cylindrical rear valve member; and c. a connecting arm linking said forward and rear valve members to each other.
Claim 4
Dependent Claim
46 words
The apparatus of claim 1 wherein said rear and forward mandrel ports are alternately connected to communicate with a source of inflation air by means comprising alternately actuated clamp members each of which are provided with ports that mate with said rear and forward mandrel ports.
Claim 5
Dependent Claim
32 words
The apparatus of claim 1 wherein means are provided for alternately gripping and releasing the mandrel in an overlapping time relationship such that said mandrel is constantly maintained in its operating position.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |