US4415393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a frangible port protector
Assignee: Baxter International Inc
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Filing: 1981-10-22
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Granted: 1983-11-15
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Expires: 2001-10-22
Abstract
Abstract A method of manufacturing a tear-off port protector for a container comprises placing flexible, typically extruded tubing on a mandrel that fills the bore of the tubing, with the tubing preferably outwardly stretched by the mandrel. A cutting blade is spaced a predetermined distance of less than the tubing wall thickness from the mandrel. One then causes the cutting blade to form an annular cut about the tubing, while maintaining the predetermined distance, and thereafter one removes the tubing from the mandrel.
Inventors
- 👤 Robert G. Grimes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:42
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; B; B29; B29C; B29C59/00; B29C59/007; B29C65/00; B29C65/02; B29C65/04; B29C66/00; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5326; B29C66/53261; B29C66/53262; B29C66/63; B29C66/636; B29C66/65; B29C66/70; B29C66/71; B29C2793/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/133; B29C66/20; B29C66/24; B29C66/242; B29C66/2422; B29C66/24221; B29K; B29K2027/00; B29K2027/06; B29L; B29L2023/00; B29L2031/00; B29L2031/712; B29L2031/7148; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1062; Y10T156/1064
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
The method of manufacturing a tear-off port protector carried on a container which comprises placing extruded plastic tubing on a mandrel that fills the bore of said tubing and stretches the tubing; spacing a cutting blade a predetermined distance of less than the tubing wall thickness from the mandrel and rotating said mandrel and tubing carried thereon, causing the cutting blade to form an annular cut about the tubing while maintaining the predetermined distance; removing the tubing from the mandrel, closing one end of the tubing, and sealing the outside surface of the other end of the tubing to said container with an access port positioned in telescoping relation inside of said tubing, said tubing sealed to the access port through a spacer bushing positioned within said tubing, whereby tearing open of said tubing along the annular cut exposes the access port.
Claim 2
Independent Claim
142 words
The method of manufacturing a tear-off port protector carried on a container which comprises placing extruded plastic tubing on a mandrel that fills the bore of said tubing and stretches the tubing; spacing a cutting blade a predetermined distance of less than the tubing wall thickness from the mandrel and rotating said mandrel and tubing carried thereon, causing the cutting blade to form an annular cut about the tubing while maintaining the predetermined distance; removing the tubing from the mandrel, closing one end of the tubing, and sealing the outside surface of the other end of the tubing to said container with an access port positioned in telescoping relation inside of said tubing, said tubing sealed to the access port through a spacer bushing positioned within said tubing, whereby tearing open of said tubing along the annular cut exposes the access port.
Claim 3
Dependent Claim
16 words
The method of claim 1 in which the closed end of said tubing is sealed shut.
Claim 4
Dependent Claim
16 words
The method of claim 2 in which said predetermined distance is from 0.005 to 0.01 inch.
Claim 5
Dependent Claim
19 words
The method of claim 3 in which the wall thickness of said tubing is from 0.02 to 0.05 inch.
Claim 6
Dependent Claim
18 words
The method of claim 4 in which said tubing has an inner diameter of 0.2 to 0.35 inch.
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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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |