US5049937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging device which uses transparent or non-transparent developer based on medium used
Assignee: Minolta Co Ltd
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Filing: 1990-04-04
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Granted: 1991-09-17
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Expires: 2010-04-04
Abstract
Abstract An electrophotographic imaging device includes a first developer for carrying transparent type toner and a second developer for carrying non-transparent type toner. A paper supplying cassette is provided for supplying a sheet of recording medium. A recording medium detector is provided for detecting the type of recording medium loaded in the paper supplying cassette whether it is a transparent recording medium or a non-transparent recording medium. A controller is provided for controlling the selection between the first and second developers such that the first developer is selected when the recording medium detector detects that a transparent recording medium is loaded in the paper supplying cassette.
Inventors
- 👤 Katsuhiko Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5029; G03G15/06; G03G15/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
An electrophotographic imaging device comprising: . first developer for carrying transparent type toner; second developer for carrying non-transparent type toner; first supplying means for supplying first recording medium; first recording medium detecting mean for detecting the type of recording medium loaded in said first supplying means from transparent recording medium and non-transparent recording medium; and control means for controlling the selection between said first and second developers such that said first developer is selected when said first recording medium detecting means detects that transparent recording medium is loaded in said first supplying means.
Claim 2
Dependent Claim
93 words
An electrophotographic imaging device comprising: . first developer for carrying transparent type toner; second developer for carrying non-transparent type toner; first supplying means for supplying first recording medium; first recording medium detecting mean for detecting the type of recording medium loaded in said first supplying means from transparent recording medium and non-transparent recording medium; and control means for controlling the selection between said first and second developers such that said first developer is selected when said first recording medium detecting means detects that transparent recording medium is loaded in said first supplying means.
Claim 3
Dependent Claim
41 words
An electrophotographic imaging device as claimed in claim 1, wherein said first recording medium detecting means detects the type of recording medium loaded in said first supplying means from transparent recording medium, non-transparent white recording medium and non-transparent color recording medium.
Claim 4
Dependent Claim
49 words
An electrophotographic imaging device as claimed in claim 2, wherein said control means controls the selection between said first and second developers such that said second developer is selected when said first recording medium detecting means detects that non-transparent color recording medium is loaded in said first supplying means.
Claim 5
Dependent Claim
56 words
An electrophotographic imaging device as claimed in claim 3, wherein said control means controls the selection between said first and second developers such that, when said first recording medium detecting means detects that non-transparent white recording medium is loaded in said first supplying means, the same developer as that selected in the previous cycle is selected.
Claim 6
Dependent Claim
25 words
An electrophotographic imaging device as claimed in claim 3, further comprising a toner amount detecting means provided in each of said first and second developers.
Claim 7
Dependent Claim
59 words
An electrophotographic imaging device as claimed in claim 5, wherein said control means controls the selection between said first and second developers such that, when said first recording medium detecting means detects that non-transparent white recording medium is loaded in said first supplying means, a developer with more toner as detected by said toner amount detecting means is used.
Claim 8
Dependent Claim
85 words
An electrophotographic imaging device as claimed in claim 1, further comprising: second supplying means for supplying second recording medium; second recording medium detecting means for detecting the type of recording medium loaded in said second supplying means between transparent recording medium and non-transparent recording medium; and said control means for controlling the selection between said first and second developers such that said first developer is selected when said second recording medium detecting means detects that transparent recording medium is loaded in said second supplying means.
Claim 9
Dependent Claim
127 words
An electrophotographic imaging device comprising: first developer for carrying transparent type toner, second developer for carrying non-transparent type toner, first supplying means for supplying first recording medium; second supplying means for supplying second recording medium; first recording medium detecting means for detecting the type of recording medium loaded in said first supplying means; second recording medium detecting means for detecting the type of recording medium loaded in said second supplying means; an activating means for activating one of said first and second supplying means; and control means for controlling the selection between said first and second developers such that said first developer is selected when the recording medium loaded in the activated supplying means is the transparent recording medium as detected by said recording medium detecting means.
Claim 10
Dependent Claim
127 words
An electrophotographic imaging device comprising: first developer for carrying transparent type toner, second developer for carrying non-transparent type toner, first supplying means for supplying first recording medium; second supplying means for supplying second recording medium; first recording medium detecting means for detecting the type of recording medium loaded in said first supplying means; second recording medium detecting means for detecting the type of recording medium loaded in said second supplying means; an activating means for activating one of said first and second supplying means; and control means for controlling the selection between said first and second developers such that said first developer is selected when the recording medium loaded in the activated supplying means is the transparent recording medium as detected by said recording medium detecting means.
Claim 11
Dependent Claim
102 words
An electrophotographic imaging device comprising: a first developer for carrying transparent type toner; a second developer for carrying non-transparent type toner; supplying means for supplying a sheet of recording medium; detecting means for detecting the type of the recording medium loaded in the supplying means whether or not the recording medium is a type of non-transparent white; control means for controlling the selection between the first and second developers so as to select the same developer as that having selected in the previous cycle of selection when the detecting mean detects that non-transparent white recording medium is loaded in the supplying means.
Claim 12
Dependent Claim
102 words
An electrophotographic imaging device comprising: a first developer for carrying transparent type toner; a second developer for carrying non-transparent type toner; supplying means for supplying a sheet of recording medium; detecting means for detecting the type of the recording medium loaded in the supplying means whether or not the recording medium is a type of non-transparent white; control means for controlling the selection between the first and second developers so as to select the same developer as that having selected in the previous cycle of selection when the detecting mean detects that non-transparent white recording medium is loaded in the supplying means.
Claim 13
Dependent Claim
116 words
An electrophotographic imaging device comprising: a first developer for carrying transparent type toner, the first developer having a toner amount detector; a second developer for carrying non-transparent type toner the second developer having a toner amount detector; supplying means for supplying a sheet of recording medium; detecting means for detecting the type of the recording medium loaded in the supplying means whether or not the recording medium is a type of non-transparent white; control means for controlling the selection between the first and second developers so as to select one developer which carries larger amount of toner than another developer when the detecting means detects that non-transparent white recording medium is loaded in the supplying means.
Claim 14
Dependent Claim
116 words
An electrophotographic imaging device comprising: a first developer for carrying transparent type toner, the first developer having a toner amount detector; a second developer for carrying non-transparent type toner the second developer having a toner amount detector; supplying means for supplying a sheet of recording medium; detecting means for detecting the type of the recording medium loaded in the supplying means whether or not the recording medium is a type of non-transparent white; control means for controlling the selection between the first and second developers so as to select one developer which carries larger amount of toner than another developer when the detecting means detects that non-transparent white recording medium is loaded in the supplying means.
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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) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |