US4269647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the continuous coating of webs having spliced joints
Assignee: Agfa Gevaert NV
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Filing: 1978-10-10
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Granted: 1981-05-26
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Expires: 1998-10-10
Abstract
Abstract Defects in the coating of webs with aqueous solutions of hydrophilic colloids traceable to the effects of web splices are reduced. The webs are butt-joined by a splicing tape applied to their back side and are provided with a hydrophobic coating over their front side at the splicing region. The invention is particularly advantageous in the manufacture of photographic material.
Inventors
- 👤 Paul A. Verkinderen
- 👤 Ludovicus H. Verhoeven
- 👤 Lucien A. Christiaen
- 👤 Camille F. Pira
- 👤 Michel L. Marckx
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:22
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; B; B05; B05C; B05C5/00; B05C5/007; B29; B29C; B29C63/00; B29C63/0004; B29C65/00; B29C65/48; B29C65/50; B29C65/5042; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/40; B29C66/41; B29C66/43; B65; B65H; B65H21/00; C; C09; C09J; C09J5/00; B29C65/5092; B29C66/70; B29C66/71; B65H2301/00; B65H2301/40; B65H2301/46; B65H2301/463; B65H2301/4631; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T156/1093; Y10T156/1095
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
Method for the continuous coating of a moving web with a layer of an aqueous solution of hydrophilic colloid, wherein disturbances in the layer of said aqueous solution downstream of a spliced joint in the web are reduced which comprises the steps of butt-joining the web ends to each other by means of a splicing tape over the back sides of the web edges proximate the splice and applying to the butt-joint area at the front sides of the webs a hydrophobic coating prior to applying the layer of aqueous colloid solution.
Claim 2
Dependent Claim
92 words
Method for the continuous coating of a moving web with a layer of an aqueous solution of hydrophilic colloid, wherein disturbances in the layer of said aqueous solution downstream of a spliced joint in the web are reduced which comprises the steps of butt-joining the web ends to each other by means of a splicing tape over the back sides of the web edges proximate the splice and applying to the butt-joint area at the front sides of the webs a hydrophobic coating prior to applying the layer of aqueous colloid solution.
Claim 3
Dependent Claim
18 words
Method according to claim 1, wherein said hydrophobic coating is applied immediately after the splicing of the webs.
Claim 4
Dependent Claim
18 words
Method according to claim 1, wherein said hydrophobic coating is applied symmetrically across the butt-joint of the webs.
Claim 5
Dependent Claim
17 words
Method according to claim 1, wherein said hydrophobic coating is applied by a pad soaked with composition.
Claim 6
Dependent Claim
13 words
Method according to claim 1, wherein said hydrophobic coating is applied by spray-coating.
Claim 7
Dependent Claim
29 words
The method of claim 1 wherein the separation between the adjacent end edges of the webs at said spliced joint is generally within the range of about 0.05-0.15 mm.
References Cited (Backward Citations)
US2319353A
Cited
GB986259A
Cited
US3518141A
Cited
US3531362A
Cited
US3655473A
Cited
GB1333083A
Cited
US4024302A
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US3972762A
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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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |