Patent US4662734A successfully refreshed from Google Patents.
US4662734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bellows
Assignee: SAKAI TOKUSHU CAMERA KK
•
Filing: 1984-12-27
•
Granted: 1987-05-05
•
Expires: 2004-12-27
Abstract
Abstract A bellows including a flexible tubular body of a sheet, which is bent in alternate directions along the length thereof on circumferential folds for extensibility, and reinforcements, printed on one surface of the sheet between adjacent circumferential folds.
Inventors
- 👤 Masahiro Nishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:18
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/20; G02B7/22; G03; G03B; G03B17/00; G03B17/02; G03B17/04; G03B17/045
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
70 words
A bellows comprising: a flexible tubular body of a sheet which is bent in alternate directions along the length therefore on circumferential folds for extensibility and retractibility and reinforcements printed on a surface of the body in a predetermined pattern between adjacent circumferential folds to increase the strength of the bellows, said reinforcements comprising an ink material which will harden subsequent to being printed, wherein said ink foams when heated.
Claim 2
Dependent Claim
70 words
A bellows comprising: a flexible tubular body of a sheet which is bent in alternate directions along the length therefore on circumferential folds for extensibility and retractibility and reinforcements printed on a surface of the body in a predetermined pattern between adjacent circumferential folds to increase the strength of the bellows, said reinforcements comprising an ink material which will harden subsequent to being printed, wherein said ink foams when heated.
Claim 3
Dependent Claim
65 words
A bellows comprising: a flexible tubular body of a sheet which is bent in alternate directions along the length therefore on circumferential folds for extensibility and retractility and reinforcements provided on a surface of the body between adjacent circumferential folds to increase the strength of the bellows, said reinforcements comprising a heat-foamable ink material in a predetermined pattern printed on the surface of the body.
Claim 4
Dependent Claim
65 words
A bellows comprising: a flexible tubular body of a sheet which is bent in alternate directions along the length therefore on circumferential folds for extensibility and retractility and reinforcements provided on a surface of the body between adjacent circumferential folds to increase the strength of the bellows, said reinforcements comprising a heat-foamable ink material in a predetermined pattern printed on the surface of the body.
Claim 5
Dependent Claim
28 words
A bellows according to claim 2, wherein said sheet comprises three layers interposed one on another, consisting of an outer layer, and intermediate layer, and an inner layer.
Claim 6
Dependent Claim
23 words
A bellows according to claim 2, further comprising conductive layer of a predetermined pattern which is provided on the surface of the sheet.
Claim 7
Dependent Claim
25 words
A bellows according to claim 2, further comprising a layer of a predetermined pattern provided on the surface of the body for feeding electrical signals.
Claim 8
Dependent Claim
18 words
A bellows according to claim 4, wherein said conductive layer is printed on the surface of the sheet.
Claim 9
Dependent Claim
19 words
A bellows according to claim 5, wherein said signal feeding layer is printed on the surface of the sheet.
Claim 10
Dependent Claim
19 words
A bellows according to claim 2, further comprising a heat transfer layer provided on the surface of the sheet.
Claim 11
Dependent Claim
19 words
A bellows according to claim 8, wherein said heat transfer layer is printed on the surface of the sheet.
Claim 12
Dependent Claim
25 words
A bellows according to claim 2, further comprising a layer which is provided on the surface of the sheet to prevent the transmission of heat.
Claim 13
Dependent Claim
17 words
A bellows according to claim 10, wherein said layer is printed on the surface of the sheet.
Claim 14
Dependent Claim
19 words
A bellows according to claim 2, further comprising a light interception layer printed on the surface of the sheet.
References Cited (Backward Citations)
DE8001872U1
Cited
US1500391A
Cited
US2516347A
Cited
US2578111A
Cited
US3315704A
Cited
US3375767A
Cited
US3421425A
Cited
US3861423A
Cited
US4325769A
Cited
US4547053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |