US4902085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polygon mirror
Assignee: Konica Minolta Inc
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Filing: 1988-06-01
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Granted: 1990-02-20
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Expires: 2008-06-01
Abstract
Abstract The invention provides a rotatable polygon mirror consisting of (a) cylindrical boss being disposed at the center part of polygon and having a hole therein, (b) side plate being disposed at each side of polygon, the outer surface of the side plate forming a mirror surface, (c) connecting-plate for connecting between the cylindrical boss and the side plate, and rib being radially disposed between the cylindrical boss and each corner of polygon.
Inventors
- 👤 Kazuhiko Murakoshi
- 👤 Toshio Shimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:39
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/09
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
102 words
A rotatable polygonal mirror comprising a boss at a center of a polygon and having a hole therein, side members each constituting a side of said polygon, an outer surface of each of said side members forming a mirror surface, each of said side members having ends at a boundary between adjacent side members, each of said side members having a center intermediate said ends, the thickness of said side members gradually decreasing from said ends toward said center, a plate between said boss and each of said side members, and a rib extending radially from said boss to each said boundary.
Claim 2
Dependent Claim
102 words
A rotatable polygonal mirror comprising a boss at a center of a polygon and having a hole therein, side members each constituting a side of said polygon, an outer surface of each of said side members forming a mirror surface, each of said side members having ends at a boundary between adjacent side members, each of said side members having a center intermediate said ends, the thickness of said side members gradually decreasing from said ends toward said center, a plate between said boss and each of said side members, and a rib extending radially from said boss to each said boundary.
Claim 3
Dependent Claim
20 words
The mirror of claim 1 wherein said boss, said side member, said plate, and said rib are made of resin.
Claim 4
Dependent Claim
22 words
The mirror of claim 2 wherein said boss, said side member, said plate, and said rib are molded as a single unit.
Claim 5
Dependent Claim
15 words
The mirror of claim 1 wherein said outer surface is covered with a metal film.
Claim 6
Dependent Claim
15 words
The mirror of claim 4 wherein said metal film is covered with a protective film.
Claim 7
Dependent Claim
34 words
The mirror of claim 1 wherein said side member has a joint at or adjacent a boundary between adjacent side members and is thinner from the inside of said side member at said joint.
Claim 8
Dependent Claim
106 words
A rotatable polygonal mirror comprising a boss at a center of a polygon and having a hole therein, side members each constituting a side of said polygon, an outer surface of each of said side members forming a mirror surface, each of said side members having ends at a boundary between adjacent side members, a plate between said boss and each of said side members, a rib extending radially from said boss to each said boundary, each of said side members having a joint at or adjacent said boundary and being thinner from the inside of each of said side members at or adjacent said joint.
Claim 9
Dependent Claim
106 words
A rotatable polygonal mirror comprising a boss at a center of a polygon and having a hole therein, side members each constituting a side of said polygon, an outer surface of each of said side members forming a mirror surface, each of said side members having ends at a boundary between adjacent side members, a plate between said boss and each of said side members, a rib extending radially from said boss to each said boundary, each of said side members having a joint at or adjacent said boundary and being thinner from the inside of each of said side members at or adjacent said joint.
Claim 10
Dependent Claim
20 words
The mirror of claim 7 wherein said boss, said side member, said plate, and said rib are made of resin.
Claim 11
Dependent Claim
22 words
The mirror of claim 8 wherein said boss, said side member, said plate, and said rib are molded as a single unit.
Claim 12
Dependent Claim
15 words
The mirror of claim 7 wherein said outer surface is covered with a metal film.
Claim 13
Dependent Claim
15 words
The mirror of claim 10 wherein said metal film is covered with a protective film.
Claim 14
Dependent Claim
34 words
The mirror of claim 7 wherein said side member has a joint at or adjacent a boundary between adjacent side members and is thinner from the inside of said side member at said joint.
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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |