US4887623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing particles from a flexible support
Assignee: Fujifilm Holdings Corp
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Filing: 1987-07-01
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Granted: 1989-12-19
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Expires: 2007-07-01
Abstract
Abstract A method and apparatus for removing particles from a flexible sheet. The sheet is run over a rotating rod, rotating oppositely to the moment of the sheet. The rod is immersed on its lower side in a bath of solvent and excess solvent is removed from the bath and is filtered. Additionally, solvent may be applied to the sheet before it reaches the rotating rod or a negative pressure applied just upstream of the rod sucks away the particles.
Inventors
- 👤 Tuyoshi Sugiyama
- 👤 Hideo Takeda
- 👤 Tsunehiko Sato
- 👤 Hiroshi Chikamasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; B; B05; B05C; B05C11/00; B05C11/02; B05C11/023; B05C11/025; G11; G11B; G11B23/00; G11B23/50; G11B23/502
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
A cleaning apparatus for removing particles from a flexible sheet, comprising: means for running a flexible sheet in a first detection past a first position; a rotatable rod member disposed adjacent said flexible sheet at said first position; drive means for rotating said rod member at said first position in a direction opposite said first direction; a block having a vertical first slit holding a solvent and rotatably supporting said rod member at a top of said first slit; and means for supplying said solvent to said first slit, wherein said rod member has an outer circumferential surface comprising carbide of a surface roughness in a range from about 0.05 micrometers to 1 micrometers.
Claim 2
Dependent Claim
114 words
A cleaning apparatus for removing particles from a flexible sheet, comprising: means for running a flexible sheet in a first detection past a first position; a rotatable rod member disposed adjacent said flexible sheet at said first position; drive means for rotating said rod member at said first position in a direction opposite said first direction; a block having a vertical first slit holding a solvent and rotatably supporting said rod member at a top of said first slit; and means for supplying said solvent to said first slit, wherein said rod member has an outer circumferential surface comprising carbide of a surface roughness in a range from about 0.05 micrometers to 1 micrometers.
Claim 3
Dependent Claim
22 words
A cleaning apparatus as recited in claim 1, wherein said block further comprises a vertical second slit disposed adjacent said first direction.
Claim 4
Dependent Claim
21 words
A cleaning apparatus as recited in claim 2, further comprising means for applying a negative gas pressure to said second slit.
Claim 5
Dependent Claim
19 words
A cleaning apparatus as recited in claim 2, wherein said supplying means supplies said solvent to said second slit.
Claim 6
Dependent Claim
34 words
A cleaning apparatus as recited in claim 1, further comprising means disposed at a position located to a side of said block opposite said first direction for coating said flexible sheet with a solvent.
Claim 7
Dependent Claim
54 words
A cleaning apparatus as recited in claim 1: wherein said block further includes a first collector disposed in said first direction from said first slit for collecting said solvent from said first slit; and wherein said supply means receives said solvent collected by said first collector and further includes filtering means for said solvent.
Claim 8
Dependent Claim
42 words
A cleaning apparatus as recited in claim 6: wherein said block further includes a second collector disposed opposite said first direction from said first slit for collecting said solvent; and wherein said supplying means receives said solvent collected by said second collector.
Claim 9
Dependent Claim
25 words
A cleaning apparatus as recited in claim 1, wherein said rod member has an outside diameter in a range from 1 mm to 50 mm.
Claim 10
Dependent Claim
28 words
A cleaning apparatus as recited in claim 1, wherein said drive means comprises means for driving said rod member at a peripheral speed of at least 0.1 cm/sec.
Claim 11
Dependent Claim
33 words
A cleaning apparatus as recited in claim 1, wherein a clearance between said rod member and said flexible sheet is such that said rod removes substantially all of said solvent from said sheet.
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) | 1992-12-18 | 1993-06-19 | 1993-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-18 | 1997-06-19 | 1997-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-18 | 2001-06-19 | 2001-12-19 | $7700.00 | Window Closed / Lapsed |