US4529624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Discoloration resistant heat transfer labeling
Assignee: Dennison Manufacturing Co
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Filing: 1984-01-09
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Granted: 1985-07-16
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Expires: 2004-01-09
Abstract
Abstract Product and process for heat transfer labeling employing a release layer that is resistant to discoloration, cracking and crawling. The release layer is formed by a blend of oxidized and unoxidized polyethylenes in proportions that prevent objectionable discoloration and hold a superimposed design in situ in order to relieve stresses that could otherwise produce cracking and crawling during heat transfer labeling. Viscosity can be suitably controlled by the addition of a minority amount of paraffin.
Inventors
- 👤 Karl E. Hubbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:19
CPC Classifications
B; B41; B41M; B41M3/00; B41M3/12; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/17; B44C1/1712; B44C1/172; G; G09; G09F; G09F3/00; G09F3/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
73 words
The method of preparing a heat transfer release composition comprising the steps of: (1) melting a minority amount of paraffin; (2) adding an unoxidized polyethylene to the melted paraffin and agitating the combination of the unoxidized polyethylene and paraffin until the melting of the polyethylene is complete; (b 3) adding oxidized polyethylene and continuing the melting until a homogeneous, substantially colorless hot melt is produced; (4) applying the hot melt to a carrier.
Claim 2
Independent Claim
73 words
The method of preparing a heat transfer release composition comprising the steps of: (1) melting a minority amount of paraffin; (2) adding an unoxidized polyethylene to the melted paraffin and agitating the combination of the unoxidized polyethylene and paraffin until the melting of the polyethylene is complete; (b 3) adding oxidized polyethylene and continuing the melting until a homogeneous, substantially colorless hot melt is produced; (4) applying the hot melt to a carrier.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said oxidized polyethylene is present in an amount up to 10 percent by weight of the composition.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said oxidized polyethylene ethylene is at least 5 percent by weight of the composition.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said unoxidized polyethylene is present in an amount up to 90 percent by weight of the composition.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein said unoxidized polyethylene is at least 70 percent by weight of the composition.
Claim 7
Dependent Claim
22 words
The method of claim 2 wherein said oxidized polyethylene has a softening point in the range between 100° C. and 107° C.
Claim 8
Dependent Claim
26 words
The method of claim 1 wherein said unoxidized polyethylene has a viscosity in the range from about 110 cps to about 180 cps at 140° C.
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein said unoxidized polyethylene is non-emulsifiable.
Claim 10
Dependent Claim
25 words
The method of claim 1 further including the step of applying the release layer-carrier combination to a chill roll to help solidify the release layer.
Claim 11
Dependent Claim
20 words
The method of claim 9 further including the step of imprinting the release layer-carrier combination with polyamide-cellulose or polyacrylic inks.
Claim 12
Dependent Claim
19 words
The method of claim 10 including the step of applying a polyamide-nitrocellulose or polyacrylic adhesive to the design print.
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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |