Patent US4729557A successfully refreshed from Google Patents.
US4729557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feed device
Assignee: Canon Inc
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Filing: 1987-07-02
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Granted: 1988-03-08
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Expires: 2007-07-02
Abstract
Abstract A sheet feed device applicable to a recorder such as an ink jet printer or a thermal printer has feed rollers mounted on the same shaft in a spaced relationship and platen blocks mounted in spaces between the feed rollers. A sheet fed along the feed rollers is conveyed to the platen blocks by a feed force of the feed rollers.
Inventors
- 👤 Takehiko Kiyohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:33
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/02; B41J11/04; B41J15/00; B41J15/04; B41J15/06; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
138 words
A sheet feed device for a recording apparatus, comprising: a plurality of rotatable members arranged in spaced relation along a width of a sheet feed path for feeding a sheet in a feeding direction; and a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein each said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of said first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces.
Claim 2
Dependent Claim
138 words
A sheet feed device for a recording apparatus, comprising: a plurality of rotatable members arranged in spaced relation along a width of a sheet feed path for feeding a sheet in a feeding direction; and a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein each said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of said first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces.
Claim 3
Dependent Claim
21 words
A device according to claim 1, wherein said guide members are displaceable relative to a support member supporting said guide members.
Claim 4
Dependent Claim
16 words
A device according to claim 1, wherein a support member supporting said guide members is displaceable.
Claim 5
Dependent Claim
45 words
A device according to claim 1, wherein a portion of each said guide member upstream of said first guide surface thereof with respect to the sheet feeding direction is disposed inwardly of the peripheries of said rotatable members with respect to the sheet feed path.
Claim 6
Dependent Claim
14 words
A device according to claim 1, wherein each said second guide surface is flat.
Claim 7
Dependent Claim
15 words
A device according to claim 1, wherein each said second guide surface is slightly curved.
Claim 8
Dependent Claim
168 words
A sheet feed device for a recording apparatus, comprising: a plurality of rotatable members arranged in spaced relation along a width of a sheet feed path for feeding a sheet in a feeding direction; a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein each said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces; and resilient means opposed to the peripheries of said rotatable members and said first guide surfaces for urging the sheet against the peripheries of said rotating members and said first guide surfaces.
Claim 9
Dependent Claim
168 words
A sheet feed device for a recording apparatus, comprising: a plurality of rotatable members arranged in spaced relation along a width of a sheet feed path for feeding a sheet in a feeding direction; a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein each said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces; and resilient means opposed to the peripheries of said rotatable members and said first guide surfaces for urging the sheet against the peripheries of said rotating members and said first guide surfaces.
Claim 10
Dependent Claim
21 words
A device according to claim 7, wherein said guide members are displaceable relative to a support member supporting said guide members.
Claim 11
Dependent Claim
16 words
A device according to claim 7, wherein a support member supporting said guide members is displaceable.
Claim 12
Dependent Claim
18 words
A device according to claim 7, wherein said resilient means extends the width of the sheet feed path.
Claim 13
Dependent Claim
30 words
A device according to claim 7, wherein said resilient means is arranged at two points, upstream and downstream of said first guide surfaces with respect to the sheet feeding direction.
Claim 14
Dependent Claim
45 words
A device according to claim 7, wherein a portion of each said guide member upstream of said first guide surface thereof with respect to the sheet feeding direction is disposed inwardly of the peripheries of said rotatable members with respect to the sheet feed path.
Claim 15
Dependent Claim
14 words
A device according to claim 7, wherein each said second guide surface is flat.
Claim 16
Dependent Claim
15 words
A device according to claim 7, wherein each said second guide surface is slightly curved.
Claim 17
Dependent Claim
168 words
A sheet feed device for a recording apparatus, comprising: a plurality of rotatable members arranged in a spaced relation along a width of a sheet feed path for feeding a sheet in a feeding direction; a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein each said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of said rotatable members at the position of first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces; and support means displaceably supporting said guide members to enable adjustment of the position of said guide members with respect to said rotatable members.
Claim 18
Dependent Claim
168 words
A sheet feed device for a recording apparatus, comprising: a plurality of rotatable members arranged in a spaced relation along a width of a sheet feed path for feeding a sheet in a feeding direction; a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein each said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of said rotatable members at the position of first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces; and support means displaceably supporting said guide members to enable adjustment of the position of said guide members with respect to said rotatable members.
Claim 19
Dependent Claim
14 words
A device according to claim 15, wherein each said second guide surface is flat.
Claim 20
Dependent Claim
15 words
A device according to claim 15, wherein each said second guide surface is slightly curved.
Claim 21
Dependent Claim
17 words
A device according to claim 15, wherein said guide members are removably mounted on said support means.
Claim 22
Dependent Claim
17 words
A device according to claim 15, wherein said guide members are integrally fixed with said support means.
Claim 23
Dependent Claim
171 words
A recording apparatus for recording an image on a sheet fed by a sheet feed device, comprising: a plurality of rotatable members arranged in a spaced relation along the width of a sheet feed path for feeding a sheet in a feeding direction; a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces; and recording means for recording an image corresponding to information on the sheet, said recording means being disposed in a facing relation with said second guide surfaces.
Claim 24
Dependent Claim
171 words
A recording apparatus for recording an image on a sheet fed by a sheet feed device, comprising: a plurality of rotatable members arranged in a spaced relation along the width of a sheet feed path for feeding a sheet in a feeding direction; a plurality of guide members separated and disposed between said rotatable members, each said guide member having first and second guide surfaces for guiding the sheet, wherein said first guide surface is disposed to substantially coincide with a predetermined extent of the peripheries of said rotatable members with respect to the sheet feed path and each said second guide surface extends continuously from the corresponding said first guide surface downstream of first guide surface with respect to the sheet feeding direction to provide a recording area where the recording apparatus can record on the sheet supported by said second guide surfaces; and recording means for recording an image corresponding to information on the sheet, said recording means being disposed in a facing relation with said second guide surfaces.
Claim 25
Dependent Claim
14 words
An apparatus according to claim 20, wherein each said second guide surface is flat.
Claim 26
Dependent Claim
15 words
An apparatus according to claim 20, wherein each said second guide surface is slightly curved.
Claim 27
Dependent Claim
18 words
An apparatus according to claim 20, wherein said recording means comprises a recording head for ejecting liquid ink.
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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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |