Patent US1027951A successfully refreshed from Google Patents.
Patent US3173484A successfully refreshed from Google Patents.
Patent US4366107A successfully refreshed from Google Patents.
US4366107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Making shrink-fit objects
Assignee: KABEL-UND METALLWRKE GUTEHOFFNUNGSHUTTE AG
•
Filing: 1980-10-03
•
Granted: 1982-12-28
•
Expires: 2000-10-03
Abstract
Abstract Silane is grafted upon polymer molecules and the material is shaped (e.g., extruded or injection-molded) and caused to cross-link. Both steps must be completed before expanding (following reheating, if necessary) and cooling the object at the expanded state. Cap- and sleeve-making is disclosed, including internal as well as external exposure to water for cross-linking, possibly combined with the requisite preheating for the expansion.
Inventors
- 👤 Hermann U. Voigt
- 👤 Frank Patzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:39
CPC Classifications
C; C08; C08L; C08L43/00; C08L43/04; B; B29; B29C; B29C61/00; B29C61/003; B29K; B29K2023/00; B29K2105/00; B29K2105/24; B29K2995/00; B29K2995/0037; B29K2995/0049
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
85 words
The method of making a shrink object, comprising the steps of providing a polymer blend with a graft component; causing the graft component to be grafted upon the polymer, the graft component being of the type for cross-linking the polymer molecules in the presence of moisture; exposing said grafted-on polymer to moisture for obtaining the cross-linking; shaping the grafted-on polymer into a particular object; expanding the completely shaped and completely cross-linked object at an elevated temperature; and maintaining the expanded state as the object cools.
Claim 2
Independent Claim
85 words
The method of making a shrink object, comprising the steps of providing a polymer blend with a graft component; causing the graft component to be grafted upon the polymer, the graft component being of the type for cross-linking the polymer molecules in the presence of moisture; exposing said grafted-on polymer to moisture for obtaining the cross-linking; shaping the grafted-on polymer into a particular object; expanding the completely shaped and completely cross-linked object at an elevated temperature; and maintaining the expanded state as the object cools.
Claim 3
Dependent Claim
36 words
A method as in claim 1, said exposing step being carried out at a temperature in the range of from 80° C. to 200° C., the expanding step being initiated while the article is still warm.
Claim 4
Dependent Claim
21 words
A method as in claim 1, wherein the exposure step includes the internal decompositioning of a water-releasing additive in the blend.
Claim 5
Dependent Claim
16 words
A method as in claim 1, including reheating the object prior to expanding, subsequent to shaping.
Claim 6
Dependent Claim
10 words
A method as in claim 4, using microwaves for reheating.
Claim 7
Dependent Claim
20 words
A method as in claim 4 or 5, reheating the object to a temperature between 120° C. to 170° C.
Claim 8
Dependent Claim
33 words
A method as in claim 1, using as polymer one of the following: polyethylene, or a copolymer of ethylene, or ethylene propylene rubber, or a blend of ethylene propylene rubber and a polyolefine.
Claim 9
Dependent Claim
20 words
A method as in claim 4 or 7, reheating the object to a temperature between 130° C. and 150° C.
Claim 10
Dependent Claim
33 words
A method as in claim 1 or 5, including the step of using from 5 to 40 parts by weight of non-hygroscopic carbon black per 100 parts by weight of polymer as additive.
Claim 11
Dependent Claim
33 words
A method as in claim 1, including the step of using from 5 to 30 parts by weight of anorganic filler material such as chalk, kaolin, or talcum per 100 parts of polymer.
Claim 12
Dependent Claim
24 words
A method as in claim 1, including the step of heating the blend for shaping as well as maintaining an elevated temperature for cross-linking.
Claim 13
Dependent Claim
30 words
A method as in claim 1, wherein the exposure step includes placing the object into or running the object through a bath having a temperature in excess of 80° C.
Claim 14
Independent Claim
99 words
The method comprising the steps of providing a polymer blend with a graft component, the graft component being of the type for cross-linking the polymer molecules when grafted thereon, and in the presence of moisture; causing the graft component to be grafted upon the polymer; shaping the grafted-on polymer to a particular shape; at least one of the causing and shaping steps including an extrusion of the grafted-on polymer; exposing said shape to moisture for obtaining the cross-linking; expanding said shape, after having completed cross-linking and at an elevated temperature; and maintaining the expanded state as the objects cools.
Claim 15
Independent Claim
99 words
The method comprising the steps of providing a polymer blend with a graft component, the graft component being of the type for cross-linking the polymer molecules when grafted thereon, and in the presence of moisture; causing the graft component to be grafted upon the polymer; shaping the grafted-on polymer to a particular shape; at least one of the causing and shaping steps including an extrusion of the grafted-on polymer; exposing said shape to moisture for obtaining the cross-linking; expanding said shape, after having completed cross-linking and at an elevated temperature; and maintaining the expanded state as the objects cools.
Claim 16
Dependent Claim
26 words
A method as in claim 1, 2, 7 or 13, including the step of using a bath of water mixed with glycerin, or polyalcohol, or oil.
Claim 17
Dependent Claim
17 words
A method as in claim 14, wherein the bath's temperature is between 140° C. and 180° C.
Claim 18
Dependent Claim
40 words
A method as in claim 1 or 13, wherein a silane is used as a graft component, the blend including also a peroxide for obtaining radical sites for grafting, the mol ratio of the silane to peroxide being about 10:1.
Claim 19
Dependent Claim
17 words
A method as in claim 1, the shaping including an extrusion step prior to said exposing step.
Claim 20
Dependent Claim
24 words
The method as in claim 13 or 17, wherein the shaping is carried out by extruding the polymer into a mold to obtain caps.
Claim 21
Dependent Claim
24 words
The method as in claim 13 or 17, wherein the shaping is carried out by extruding polymer to obtain a hose as the shape.
References Cited (Backward Citations)
AT188510B
Cited
US3949110A
Cited
US4049757A
Cited
US4117195A
Cited
US4117195B1
Cited
US4117063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |