US5075732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus which sets fixing roller speed depending on the number of copies on the transfer drum
Assignee: Canon Inc
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Filing: 1990-08-28
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Granted: 1991-12-24
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Expires: 2010-08-28
Abstract
Abstract An image forming apparatus includes an image bearing member; a device for forming an image on the image bearing member; a device for transferring the image from the image bearing member to an image receiving material, the transfer device including a device for carrying the image receiving material to an image transfer position where the image transfer device is operable, and the carrying device is capable of supporting plural image receiving materials simultaneously; a device for fixing the image having been transferred onto the image receiving material, the fixing device being selectively operable at a first fixing speed and a second fixing speed which is lower than the first fixing speed; wherein when the fixing device operates at the second fixing speed, the carrying device carries only one image receiving material.
Inventors
- 👤 Takeshi Menjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/165; G03G15/1655; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2045
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
153 words
An image forming apparatus, comprising: an image bearing means; means for forming an image on said image bearing means; means for transferring the image from said image bearing means to an image receiving material, said transfer means including means for carrying the image receiving material to an image transfer position where said image transfer means is operable, and said carrying means is capable of supporting plural image receiving materials simultaneously; means for fixing the image having been transferred onto the image receiving material, said fixing means being selectively operable at a first fixing speed and a second fixing speed which is lower than the first fixing speed; wherein when said fixing means operates at the first speed, said carrying means selectively carries one image receiving material or plurality of image receiving materials simultaneously and when said fixing means operates at the second fixing speed, said carrying means carries only one image receiving material.
Claim 2
Dependent Claim
153 words
An image forming apparatus, comprising: an image bearing means; means for forming an image on said image bearing means; means for transferring the image from said image bearing means to an image receiving material, said transfer means including means for carrying the image receiving material to an image transfer position where said image transfer means is operable, and said carrying means is capable of supporting plural image receiving materials simultaneously; means for fixing the image having been transferred onto the image receiving material, said fixing means being selectively operable at a first fixing speed and a second fixing speed which is lower than the first fixing speed; wherein when said fixing means operates at the first speed, said carrying means selectively carries one image receiving material or plurality of image receiving materials simultaneously and when said fixing means operates at the second fixing speed, said carrying means carries only one image receiving material.
Claim 3
Dependent Claim
27 words
An apparatus according to claim 1, wherein the first and second speeds are selected in accordance with the material of which the image receiving material is made.
Claim 4
Dependent Claim
23 words
An apparatus according to claim 2, wherein when said image receiving material is made of resin sheet, the second fixing speed is selected.
Claim 5
Dependent Claim
21 words
An apparatus according to claim 1, wherein the image receiving material is electrostatically attracted on said image receiving material carrying means.
Claim 6
Dependent Claim
58 words
An apparatus according to claim 1, wherein the image receiving material carrying means includes a drum frame having cylindrical rings at opposite longitudinal ends and a connector for connecting the rings and a dielectric sheet stretched to cover an opening defined by the rings and the connector, wherein the image receiving material is carried on the dielectric sheet.
Claim 7
Dependent Claim
34 words
An apparatus according to claim 5, wherein said carrying means rotates carrying the image receiving material to pass through the transfer station so that plural images are superposedly transferred onto the image receiving material.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 6, wherein on said image receiving material, a full-color image is formed.
Claim 9
Dependent Claim
21 words
An apparatus according to claim 7, wherein said fixing means is a heat fixing means which fixes the image by heat.
Claim 10
Dependent Claim
32 words
An apparatus according to claim 5, wherein when said fixing means operates at the second fixing speed, the image receiving material is carried on the dielectric sheet diametrically opposite from the connector.
Claim 11
Dependent Claim
35 words
An apparatus according to claim 1, wherein even if plural image formations are instructed, only one image receiving material is carried on said carrying means when said fixing means operates at the second fixing speed.
Claim 12
Dependent Claim
31 words
An apparatus according to claim 1, wherein said fixing means includes a pair of rotatable members rotatable at first and second peripheral speeds corresponding to said first and second fixing speeds.
Claim 13
Dependent Claim
39 words
An apparatus according to claim 5, wherein said carrying means is capable of carrying plural image receiving materials having lengths as measured along their conveyance direction of not more than one half a circumferential length of said carrying means.
Claim 14
Dependent Claim
23 words
An apparatus according to claim 1, wherein when the image receiving material is of standard size paper, said first fixing speed is selected.
Claim 15
Dependent Claim
130 words
An image forming apparatus, comprising: an image bearing means; means for forming an image on said image bearing means; means for transferring the image from said image bearing means to an image receiving material, said transfer means including means for carrying the image receiving material to an image transfer position where said image transfer is performed, and said carrying means is capable of supporting plural image receiving materials simultaneously; means for fixing the image having been transferred onto the image receiving material, said fixing means being selectively operable at a first fixing speed and a second fixing speed which is lower than the first fixing speed; wherein the number of image receiving materials which said carrying means carries is different in accordance with a selected one of the fixing speeds.
Claim 16
Dependent Claim
130 words
An image forming apparatus, comprising: an image bearing means; means for forming an image on said image bearing means; means for transferring the image from said image bearing means to an image receiving material, said transfer means including means for carrying the image receiving material to an image transfer position where said image transfer is performed, and said carrying means is capable of supporting plural image receiving materials simultaneously; means for fixing the image having been transferred onto the image receiving material, said fixing means being selectively operable at a first fixing speed and a second fixing speed which is lower than the first fixing speed; wherein the number of image receiving materials which said carrying means carries is different in accordance with a selected one of the fixing speeds.
Claim 17
Dependent Claim
117 words
An image forming apparatus, comprising: an image forming means for forming an image on an image receiving material; means for carrying the image receiving material, said carrying means being capable of carrying plural image receiving materials simultaneously; means for fixing an image on the image receiving material, said fixing means being operable selectively at a first fixing sped and a second fixing speed which is lower than the first fixing speed, wherein when said fixing means operates at the first fixing speed, said carrying means selectively carries one image receiving material or plural image receiving materials simultaneously and when said fixing means operates at the second fixing speed, said carrying means carries only one image receiving material.
Claim 18
Dependent Claim
117 words
An image forming apparatus, comprising: an image forming means for forming an image on an image receiving material; means for carrying the image receiving material, said carrying means being capable of carrying plural image receiving materials simultaneously; means for fixing an image on the image receiving material, said fixing means being operable selectively at a first fixing sped and a second fixing speed which is lower than the first fixing speed, wherein when said fixing means operates at the first fixing speed, said carrying means selectively carries one image receiving material or plural image receiving materials simultaneously and when said fixing means operates at the second fixing speed, said carrying means carries only one image receiving material.
Claim 19
Dependent Claim
27 words
An apparatus according to claim 15, wherein the first or second fixing speed is selected in accordance with material of which the image receiving material is made.
Claim 20
Dependent Claim
48 words
An apparatus according to claim 1, wherein when said fixing means operates at the first fixing speed, the number of the image receiving materials carried on said carrying means is selected in accordance with the size and number of the image recording materials on which images are formed.
Claim 21
Dependent Claim
49 words
An apparatus according to claim 15, wherein when said fixing means operates at the first fixing speed, the number of the image receiving materials is carried on said carrying means is selected in accordance with the size and number of the image recording materials on which images are formed.
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) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |