US3885015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing a heat-shrinkable sheet-like material
Assignee: Mitsubishi Chemical Corp
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Filing: 1973-01-11
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Granted: 1975-05-20
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Expires: 1993-01-11
Abstract
Abstract A method of processing a heat-shrinkable sheet-like material comprising passing said sheet-like material under low tension between a heating device A heated at a temperature higher than a point at which said sheet-like material begins to shrink and a device B which controls the rising of the heated sheet-like material and which is spaced from said heating device A by a distance larger than the thickness of said sheet-like material while bringing the sheet-like material into contact at least with the heating device A without positive pressing thereto, heating the sheet-like material and developing a random solid heatshrinkage pattern thereon.
Inventors
- 👤 Michikaze Ono
- 👤 Toshio Ito
- 👤 Shoichi Nagai
- 👤 Hironaga Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:07
CPC Classifications
D; D06; D06C; D06C23/00; D06C23/04; B; B29; B29C; B29C61/00; B29C61/02; B29C61/06; B29C61/0608; B29C61/0658; D06C2700/00; D06C2700/31; Y; Y10; Y10S; Y10S264/00; Y10S264/71
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
265 words
A METHOD OF PROCESSING A HEAT-SHRINKABLE SHEET-LIKE MATERIAL HAVING A SPECIFIC VOLUME OF NOT MORE THAN 5 CM3/G AND A MAXIMUM HEAT-SHRINKAGE STRESS UNDER DRY HEAT OF AT LEAST 1/10 W G/CM WHEREIN W IS THE WEIGHT IN GRAMS OF THE SHEET-LIKE MATERIAL PER SQUARE METER, TO PRODUCE A PATTERN IN SAID MATERIAL COMPRISING PASSING SAID SHEET-LIKE MATERIAL SEQUENTIALLY THROUGH NIPS BETWEEN A FIRST HEATING DEVICE HEATED TO SURFACE TEMPERATURE NOT LOWER THAN THE MINIMUM TEMPERATURE AT WHICH THE SHEET-LIKE MATERIAL CAN SHRINK BUT BELOW THE MELTING POINT OF THE HEAT-SHRINKABLE SUBSTANCE CONTAINED IN SAID SHEET-LIKE MATERIAL TO PRODUCE A PATTERN IN SAID MATERIAL AND A SECOND HEATED DEVICE HEATED TO A SURFACE TEMPERATURE WHICH IS AT LEAST THE TEMPERATURE OF THE ATMOSPHERE DURING PROCESSING BUT IS BELOW THE MELTING OR SOFTENING POINT OF ANY HEAT-SHRINKABLE TERMOPLASTIC SUBSTANCE CONTAINED IN SAID SHEET-LIKE MATERIAL AND SPACED FROM SAID FIRST HEATING DEVICE BY A DISTANCE LARGER THAN THE THICKNESS OF SAID SHEET-LIKE MATERIAL BUT NOT LARGER THAN 100 TIMES THE THICKNESS OF THE SHEETLIKE MATERIAL TO CONTROL THE PATTERN PRODUCED IN SAID SHEET-LIKE MATERIAL, UNDER A TENSION NOT EXCEEDING THE SHRINKAGE STRESS OF SAID SHEET-LIKE MATERIAL WHILE BRINGING THE SHEET-LIKE MATERIAL INTO CONTACT WITH SAID FIRST HEATING DEVICE WITHOUT POSITIVE PRESSING THERETO AND AT LEAST BRINGING A PORTION OF SAID SHEETLIKE MATERIAL INTO CONTACT WITH SAID SECOND DEVICE, HEATING THE SHEET-LIKE MATERIAL AND DEVELOPING A RANDOM SOLID HEATSHRINKAGE PATTERN THEREON, THERE BEING AT LEAST TWO OF SAID FIRST HEATING DEVICES AND TWO OF SAID SECOND HEATED DEVICES USED, SAID FIRST AND SECOND DEVICES BEING USED IN PAIRS.
Claim 2
Independent Claim
265 words
A METHOD OF PROCESSING A HEAT-SHRINKABLE SHEET-LIKE MATERIAL HAVING A SPECIFIC VOLUME OF NOT MORE THAN 5 CM3/G AND A MAXIMUM HEAT-SHRINKAGE STRESS UNDER DRY HEAT OF AT LEAST 1/10 W G/CM WHEREIN W IS THE WEIGHT IN GRAMS OF THE SHEET-LIKE MATERIAL PER SQUARE METER, TO PRODUCE A PATTERN IN SAID MATERIAL COMPRISING PASSING SAID SHEET-LIKE MATERIAL SEQUENTIALLY THROUGH NIPS BETWEEN A FIRST HEATING DEVICE HEATED TO SURFACE TEMPERATURE NOT LOWER THAN THE MINIMUM TEMPERATURE AT WHICH THE SHEET-LIKE MATERIAL CAN SHRINK BUT BELOW THE MELTING POINT OF THE HEAT-SHRINKABLE SUBSTANCE CONTAINED IN SAID SHEET-LIKE MATERIAL TO PRODUCE A PATTERN IN SAID MATERIAL AND A SECOND HEATED DEVICE HEATED TO A SURFACE TEMPERATURE WHICH IS AT LEAST THE TEMPERATURE OF THE ATMOSPHERE DURING PROCESSING BUT IS BELOW THE MELTING OR SOFTENING POINT OF ANY HEAT-SHRINKABLE TERMOPLASTIC SUBSTANCE CONTAINED IN SAID SHEET-LIKE MATERIAL AND SPACED FROM SAID FIRST HEATING DEVICE BY A DISTANCE LARGER THAN THE THICKNESS OF SAID SHEET-LIKE MATERIAL BUT NOT LARGER THAN 100 TIMES THE THICKNESS OF THE SHEETLIKE MATERIAL TO CONTROL THE PATTERN PRODUCED IN SAID SHEET-LIKE MATERIAL, UNDER A TENSION NOT EXCEEDING THE SHRINKAGE STRESS OF SAID SHEET-LIKE MATERIAL WHILE BRINGING THE SHEET-LIKE MATERIAL INTO CONTACT WITH SAID FIRST HEATING DEVICE WITHOUT POSITIVE PRESSING THERETO AND AT LEAST BRINGING A PORTION OF SAID SHEETLIKE MATERIAL INTO CONTACT WITH SAID SECOND DEVICE, HEATING THE SHEET-LIKE MATERIAL AND DEVELOPING A RANDOM SOLID HEATSHRINKAGE PATTERN THEREON, THERE BEING AT LEAST TWO OF SAID FIRST HEATING DEVICES AND TWO OF SAID SECOND HEATED DEVICES USED, SAID FIRST AND SECOND DEVICES BEING USED IN PAIRS.
Claim 3
Dependent Claim
44 words
The method of claim 1 wherein said sheet-like material is selected from the group consisting of films, non-woven fabrics, heat shrinkable paper, knitted fabrics and woven fabrics each of which is composed of a material comprising a major proportion of a heat-shrinkable thermoplastic substance.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the distance between the first heating devices and the second devices becomes progressively smaller towards the advancing direction of the sheet-like material.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said sheet-like material has a dye adhered therto.
References Cited (Backward Citations)
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US2536048A
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US2700205A
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US3484839A
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US3501565A
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US3673650A
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |