US3900652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Male piece of the velvet type fastener
Assignee: Kanebo Ltd
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Filing: 1973-05-22
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Granted: 1975-08-19
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Expires: 1993-05-22
Abstract
Abstract In the velvet type fastener, each male element of the male piece consists of a stem and a cap laterally expanded at the top thereof, and is composed of compositions of a first and a second polyamide polymers having different melting points. These polymers are formed in crystalline composition in the stem and in amorphous composition in the cap. The stem consists of a core portion formed with the first polymer of lower melting point, and a sheath portion formed with the second polymer having a higher melting point. The cap consists of a core and outer layer portions formed with the first polymer, and an intermediate portion of a second polymer sandwiched therebetween.
Inventors
- 👤 Tohru Uraya
- 👤 Eichi Kudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
B; B29; B29D; B29D5/00; B29D5/02; A; A44; A44B; A44B18/00; A44B18/0003; A44B18/0015; A44B18/0019; A44B18/0069; A44B18/0092; D; D03; D03D; D03D27/00; Y; Y10; Y10T; Y10T24/00; Y10T24/16; Y10T24/1696; Y10T24/27; Y10T24/2775; Y10T24/2783; Y10T428/00; Y10T428/23907; Y10T428/23957; Y10T428/24; Y10T428/24008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
IN A MALE PIECE OF A VELVET TYPE FASTENER PROVIDED WITH A PLURALITY OF MALE ELEMENTS PROJECTED UPRIGHT FROM A BASE FABRIC, AN IMPROVEMENT COMPRISING, EACH MALE ELEMENT MADE OF A SENYTHETIC MONOFILAMENT YARN COMPOSED OF A CORE PORTION EXTENDED ALONG AN AXIS THEREOF AND A SHEATH PORTION ENCIRCLING SAID CORE PORTION, SAID CORE PORTION COMPOSED OF A FIRST POLYAMIDE POLYMER OF A LOWER MELTING POINT WHILE SAID SHEATH PORTION IS COMPOSED OF A SECOND POLYMIDE POLYMER OF HIGHER MELTING POINT IN COMPARISON WITH SAID FIRST NYLON POLYAMIDE RESIN, SAID MALE ELEMENT BEING COMPOSED OF A STEM AND A LATERALLY EXPANDED CAP FORMED AT A TOP END PORTION OF SAID STEM, SAID CAP BEING COMPOSED OF A CORE AND AN OUTER LAYER FORMED WITH SAID FIRST POLYAMIDE POLYMER AND AN INTERMEDIATE PORTION BEING FORMED WITH SAID SECOND POLYAMIDE POLYMER, THE TEMPERATURE DIFFERNCE BERWEEN SAID MELTING POINTS OF SAID FIRST AND SECOND POLYAMIDE POLYMERS BEING BETWEEN 40* AND 60*C.
Claim 2
Dependent Claim
158 words
IN A MALE PIECE OF A VELVET TYPE FASTENER PROVIDED WITH A PLURALITY OF MALE ELEMENTS PROJECTED UPRIGHT FROM A BASE FABRIC, AN IMPROVEMENT COMPRISING, EACH MALE ELEMENT MADE OF A SENYTHETIC MONOFILAMENT YARN COMPOSED OF A CORE PORTION EXTENDED ALONG AN AXIS THEREOF AND A SHEATH PORTION ENCIRCLING SAID CORE PORTION, SAID CORE PORTION COMPOSED OF A FIRST POLYAMIDE POLYMER OF A LOWER MELTING POINT WHILE SAID SHEATH PORTION IS COMPOSED OF A SECOND POLYMIDE POLYMER OF HIGHER MELTING POINT IN COMPARISON WITH SAID FIRST NYLON POLYAMIDE RESIN, SAID MALE ELEMENT BEING COMPOSED OF A STEM AND A LATERALLY EXPANDED CAP FORMED AT A TOP END PORTION OF SAID STEM, SAID CAP BEING COMPOSED OF A CORE AND AN OUTER LAYER FORMED WITH SAID FIRST POLYAMIDE POLYMER AND AN INTERMEDIATE PORTION BEING FORMED WITH SAID SECOND POLYAMIDE POLYMER, THE TEMPERATURE DIFFERNCE BERWEEN SAID MELTING POINTS OF SAID FIRST AND SECOND POLYAMIDE POLYMERS BEING BETWEEN 40* AND 60*C.
Claim 3
Dependent Claim
159 words
In a male piece of a velvet type fastener provided with a plurality of male elements projected upright from a base fabric, an improvement comprising, each male element made of a synthetic monofilament yarn composed of a core portion extended along an axis thereof and a sheath portion encircling said core portion, said core portion composed of a first polyamide polymer of a lower melting point while said sheath portion is composed of a second polyamide polymer of higher melting point in comparison with said first nylon polyamide resin, said male element being composed of a stem and a laterally expanded cap formed at a top end portion of said stem, said cap being composed of a core and an outer layer formed with said first polyamide polymer and an intermediate portion being formed with said second polyamide polymer, the temperature difference between said melting points of said first and second polyamide polymers being between about 20 and 60*C.
Claim 4
Dependent Claim
159 words
In a male piece of a velvet type fastener provided with a plurality of male elements projected upright from a base fabric, an improvement comprising, each male element made of a synthetic monofilament yarn composed of a core portion extended along an axis thereof and a sheath portion encircling said core portion, said core portion composed of a first polyamide polymer of a lower melting point while said sheath portion is composed of a second polyamide polymer of higher melting point in comparison with said first nylon polyamide resin, said male element being composed of a stem and a laterally expanded cap formed at a top end portion of said stem, said cap being composed of a core and an outer layer formed with said first polyamide polymer and an intermediate portion being formed with said second polyamide polymer, the temperature difference between said melting points of said first and second polyamide polymers being between about 20 and 60*C.
References Cited (Backward Citations)
US3607995A
Cited
US3785012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |