US4188439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive tape
Assignee: Toyo Kagaku Co Ltd
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Filing: 1978-06-30
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Granted: 1980-02-12
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Expires: 1998-06-30
Abstract
Abstract An adhesive tape is provided which comprises a film of high density polyethylene having a density of not less than 0.94g/cc elongated at least six times only transversely to the longitudinal direction of the tape and a layer of pressure sensitive adhesive applied at least on one side of said elongated film of high density polyethylene. The adhesive tape has a high tensile strength against a force applied in a direction transverse to the longitudinal direction of the tape. Nevertheless, the tape can be easily torn or cut by user's hand or hands exactly transversely to the longitudinal direction of the tape without being torn zigzag or in a slanting direction.
Inventors
- 👤 Hiroshi Asakura
- 👤 Ippei Chimura
- 👤 Keisuke Kitazume
- 👤 Yoshiyuki Kaneko
- 👤 Shirou Fuse
- 👤 Akio Ueno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:54
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/29; C09J7/22; C09J7/24; C09J7/241; C09J7/243; C09J2301/00; C09J2301/10; C09J2301/16; C09J2301/162; C09J2301/18; C09J2400/00; C09J2400/20; C09J2400/28; C09J2400/283; C09J2421/00; C09J2423/00; C09J2423/005; C09J2423/006; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/24992; Y10T428/28; Y10T428/2848; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
An adhesive tape comprising a base paper material having a thickness of 30 to 150 g/m 2 , a film of high density polyethylene having a density of not less than 0.94 g/cc elongated to sixteen times only transversely to the longitudinal direction of the tape and having a thickness of 15 to 30μ, said elongated film being attached to one side of said base paper material with a layer of low density polyethylene being extruded between the base paper material and the elongated film, and a layer of pressure sensitive adhesive adhesive applied to the other side of said base paper material.
Claim 2
Dependent Claim
103 words
An adhesive tape comprising a base paper material having a thickness of 30 to 150 g/m 2 , a film of high density polyethylene having a density of not less than 0.94 g/cc elongated to sixteen times only transversely to the longitudinal direction of the tape and having a thickness of 15 to 30μ, said elongated film being attached to one side of said base paper material with a layer of low density polyethylene being extruded between the base paper material and the elongated film, and a layer of pressure sensitive adhesive adhesive applied to the other side of said base paper material.
Claim 3
Dependent Claim
30 words
The adhesive tape as claimed in claim 1 wherein said film of high density polyethylene is elongated at least ten times only transversely to the longitudinal direction of the tape.
Claim 4
Dependent Claim
24 words
The adhesive tape as claimed in claim 1, wherein said film of high density polyethylene is colored while said base paper material is white.
Claim 5
Dependent Claim
19 words
The adhesive tape as claimed in claim 1, wherein said adhesive tape is in the form of a roll.
Claim 6
Dependent Claim
26 words
The adhesive tape as claimed in claim 1, wherein said film of high density polyethylene is transparent or translucent while said base paper material is colored.
Claim 7
Dependent Claim
26 words
The adhesive tape as claimed in claim 5, wherein said colored base paper material has printed patterns, figures, letters or a combination thereof on its surface.
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) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |