US3859408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making tubular articles
Assignee: Gates Rubber Co
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Filing: 1973-01-29
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Granted: 1975-01-07
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Expires: 1993-01-29
Abstract
Abstract A method for making tubular articles successively from a continuous length of heat setting tubular carcass by inserting a plug in one end portion of the carcass, sealing the end portion, and expanding the end portion against a generally tubular mold while simultaneously heat setting the end portion.
Inventors
- 👤 Harold C Voss
- 👤 Leonard F Hartford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:02
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C33/048; B29C49/00; B29C49/0015; B29C49/02; B29C49/04; B29C49/42; B29C49/4242; B29C53/00; B29C53/02; B29C53/08; B29C53/083; B29C53/32; B29D; B29D23/00; B29D23/001; B29D23/18; B29C35/00; B29C35/16; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2621/00; B29L; B29L2016/00; B29L2023/00; B29L2023/004; B29L2023/22; Y; Y10; Y10S; Y10S264/00; Y10S264/90; Y10S264/904
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
254 words
A method of molding successively adjacent flexible tubular articles from a continuous length of reinforced, temperature setting tubular carcass compRising the steps of: inserting a first end portion of the tubular carcass in an open end, generally tubular cross-sectional mold that includes a sleeve portion with a tubular carcass receiving opening and a cavity portion with an article exit opening; sealing the first end portion of the tubular carcass near the article exit opening; internally pressurizing the tubular carcass while simultaneously: positioning a movable plug in the hollow of the tubular carcass juxtaposed the sleeve, sealing the hollow of the tubular carcass at the movable plug and expanding the first end portion radially outward against the cavity portion effecting article shaping; setting the tubular carcass disposed in the cavity portion and at least partially setting a successively connecting portion of the tubular carcass; relieving the internal pressure; pulling the set portion of the tubular carcass from the mold while simultaneously pulling successively connected portions of the tubular carcass into the sleeve portion and mold portion and positioning the at least partially cured portion of the tubular carcass near the article exit opening; severing the set portion from the tubular carcass to define a mold set tubular article of predetermined finished length; and sealing the at least partially set portion of tubular carcass at the article exit opening and repeating the above steps starting with pressurizing whereby successively adjacent tubular articles are molded and set from tubular carcass without interim waste of the tubular carcass.
Claim 2
Independent Claim
254 words
A method of molding successively adjacent flexible tubular articles from a continuous length of reinforced, temperature setting tubular carcass compRising the steps of: inserting a first end portion of the tubular carcass in an open end, generally tubular cross-sectional mold that includes a sleeve portion with a tubular carcass receiving opening and a cavity portion with an article exit opening; sealing the first end portion of the tubular carcass near the article exit opening; internally pressurizing the tubular carcass while simultaneously: positioning a movable plug in the hollow of the tubular carcass juxtaposed the sleeve, sealing the hollow of the tubular carcass at the movable plug and expanding the first end portion radially outward against the cavity portion effecting article shaping; setting the tubular carcass disposed in the cavity portion and at least partially setting a successively connecting portion of the tubular carcass; relieving the internal pressure; pulling the set portion of the tubular carcass from the mold while simultaneously pulling successively connected portions of the tubular carcass into the sleeve portion and mold portion and positioning the at least partially cured portion of the tubular carcass near the article exit opening; severing the set portion from the tubular carcass to define a mold set tubular article of predetermined finished length; and sealing the at least partially set portion of tubular carcass at the article exit opening and repeating the above steps starting with pressurizing whereby successively adjacent tubular articles are molded and set from tubular carcass without interim waste of the tubular carcass.
Claim 3
Dependent Claim
36 words
A method of molding as set forth in claim 1 and further including prior to the step of inserting a first end portion, the step of: partially setting a predetermined length of the first end portion.
Claim 4
Dependent Claim
28 words
A method of molding as set forth in claim 1 and further including simultaneously with the step of setting the tubular carcase, the step of: heatsinking the sleeve.
Claim 5
Dependent Claim
33 words
A method of molding as set forth in claim 1 and further including prior to the step of inserting a first end portion, the step of: lubricating the outside of the tubular carcass.
Claim 6
Dependent Claim
32 words
A method of molding as set forth in claim 1 and further including before the step of inserting a first end portion, the step of: lubricating the inside of the tubular carcass.
Claim 7
Dependent Claim
35 words
A method of molding as set forth in claim 1 and further including simultaneously with the step of setting the tubular carcass, the step of: molding index marks on the outside of the tubular carcass.
Claim 8
Dependent Claim
35 words
A method of molding as set forth in claim 1 and further including prior to the step of sealing the first end portion, the step of: inserting the movable plug in the first end portion.
Claim 9
Dependent Claim
27 words
A method of molding as set forth in claim 1 and further including the step of injecting steam into said end portion during setting the tubular carcass.
Claim 10
Dependent Claim
22 words
A method of molding as set forth in claim 1 comprising bending the tubular carcass while pulling it into the mold portion.
Claim 11
Dependent Claim
25 words
A method of molding as set forth in claim 1 comprising curving the tubular carcass while radially expanding the tubular carcass against the cavity portion.
Claim 12
Dependent Claim
41 words
A method of molding as set forth claim 1 and further including prior to the step of pressurizing the end portion, the steps of collapsing the tubular carcass adjacent the sleeve portion and restricting movement of the plug at the sleeve.
References Cited (Backward Citations)
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US1537860A
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US2320564A
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US2742669A
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US2903743A
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US3465384A
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |