Image forming apparatus and detecting device for detecting a type of recording sheet
First Claim
Patent Images
1. A detecting device comprising:
- a reading unit adapted to read a picture of a shadow of an edge of a fed sheet; and
a detecting unit adapted to detect a thickness of the sheet on the basis of the picture read by said reading unit.
1 Assignment
0 Petitions
Accused Products
Abstract
An image forming apparatus that detects a type of recording sheet and sets an image forming condition in accordance with the detected type of sheet includes a feeding unit that feeds a sheet, an image forming unit that forms an image on a sheet, and a reading unit that reads a picture of a surface of a sheet. A discriminating unit discriminates whether re-reading is necessary, on the basis of the picture. If so, another unit changes a reading condition of the reading unit and causes the reading unit to re-read the picture of the surface of the sheet. A detecting unit detects a type of sheet on the basis of the picture read by the reading unit, and a controlling unit controls an image forming condition on the basis of the result of the detection.
-
Citations
28 Claims
-
1. A detecting device comprising:
-
a reading unit adapted to read a picture of a shadow of an edge of a fed sheet; and
a detecting unit adapted to detect a thickness of the sheet on the basis of the picture read by said reading unit. - View Dependent Claims (2, 3)
an illuminating unit adapted to illuminate the sheet fed by said feeding unit; and
a receiving unit adapted to receive a light reflected from the sheet.
-
-
3. A detecting device according to claim 2, wherein said receiving unit includes a CMOS sensor.
-
4. A detecting device comprising:
-
a reading unit adapted to read a picture of a surface of a feeding sheet;
a discriminating unit adapted to discriminate whether a rereading is necessary on the basis of the picture read by said reading unit;
a unit adapted to change a reading condition of said reading unit and to cause said reading unit to reread a picture of a surface of the sheet, on the basis of a fact that it has been discriminated by said discriminating unit that the rereading is necessary; and
a detecting unit adapted to detect a type of the sheet on the basis of the picture read by said reading unit. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
an illuminating unit adapted to illuminate the sheet;
a light receiving unit adapted to receive a light from said illuminating unit reflected back from the sheet; and
a converting unit adapted to digitize an output of said light receiving unit.
-
-
9. A detecting device according to claim 8, wherein said light receiving unit includes a CMOS sensor.
-
10. A detecting device according to claim 8, wherein said unit adapted to cause said reading unit to reread the picture changes a gain of said converting unit.
-
11. A detecting device according to claim 8, wherein said reading unit includes a calculating unit adapted to filter-calculate an output from said converting unit, and said unit adapted to cause said reading unit to reread the picture changes calculation parameters of said calculating unit.
-
12. An image forming apparatus comprising:
-
a feeding unit adapted to feed a sheet;
an image forming unit adapted to form an image on the sheet fed by said feeding unit;
a reading unit adapted to read a picture of a shadow of an edge of the sheet fed by said feeding unit;
a detecting unit adapted to detect a thickness of the sheet on the basis of the picture read by said reading unit; and
a controlling unit adapted to control an image forming condition of said image forming unit on the basis of a result of detection. - View Dependent Claims (13, 14, 15, 16, 17)
an illuminating unit adapted to illuminate the sheet fed by said feeding unit; and
a receiving unit adapted to receive a light reflected from the sheet.
-
-
14. An image forming apparatus according to claim 13, wherein said receiving unit includes a CMOS sensor.
-
15. An image forming apparatus according to claim 12, wherein said image forming unit includes:
-
a transferring unit adapted to transfer a toner image to the sheet; and
a fixing unit adapted to fix the toner image transferred by said transferring unit on the sheet, and wherein said controlling unit controls a fixing condition of said fixing unit.
-
-
16. An image forming apparatus according to claim 15, wherein said controlling unit controls a fixing temperature of said fixing unit.
-
17. An image forming apparatus according to claim 15, wherein said controlling unit controls a fixing speed of said fixing unit.
-
18. An image forming apparatus comprising:
-
a feeding unit adapted to feed a sheet;
an image forming unit adapted to form an image on the sheet fed by said feeding unit;
a reading unit adapted to read a picture of a surface of the sheet fed by said feeding unit;
a discriminating unit adapted to discriminate whether a rereading is necessary on the basis of the picture read by said reading unit;
a unit adapted to change a reading condition of said reading unit and to cause said reading unit to reread a picture of a surface of the sheet, on the basis of a fact that it has been discriminated by said discriminating unit that the rereading is necessary;
a detecting unit adapted to detect a type of the sheet on the basis of the picture read by said reading unit; and
a controlling unit adapted to control an image forming condition of said image forming unit on the basis of a result of detection by said detecting unit. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
an illuminating unit adapted to illuminate the sheet;
a light receiving unit adapted to receive a light from said illuminating unit reflected back from the sheet; and
a converting unit adapted to digitize an output of said light receiving unit.
-
-
23. An image forming apparatus according to claim 22, wherein said light receiving unit includes a CMOS sensor.
-
24. An image forming apparatus according to claim 22, wherein said unit adapted to cause said reading unit to reread the picture changes a gain of said converting unit.
-
25. An image forming apparatus according to claim 22, wherein said reading unit includes a calculating unit adapted to filter-calculate an output from said converting, and said unit adapted to cause said reading unit to reread the picture changes calculation parameters of said calculating unit.
-
26. An image forming apparatus according to claim 18, wherein said image forming unit includes:
-
a transferring unit adapted to fix a toner image to the sheet; and
a fixing unit adapted to fix the toner image transferred by said transferring unit on the sheet, and wherein said controlling unit controls a fixing condition of said fixing unit.
-
-
27. An image forming apparatus according to claim 26, wherein said controlling unit controls a fixing temperature of said fixing unit.
-
28. An image forming apparatus according to claim 26, wherein said controlling unit controls a fixing speed of said fixing unit.
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
-
Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
-
InventorsMaruyama, Shoji
-
Primary Examiner(s)Braun, Fred L
-
Application NumberUS10/004,810Publication NumberTime in Patent Office746 DaysField of Search399/45, 399/66, 399/67, 399/68US Class Current399/45CPC Class CodesH04N 1/00681 Detecting the presence, pos...H04N 1/00716 ThicknessH04N 1/00734 Optical detectorsH04N 1/00779 Adjusting settings, e.g. mo...H04N 1/2323 according to characteristic...H04N 1/295 Circuits or arrangements fo...
