Title:
シートサイズ検知装置・画像形成装置・シートサイズ検知方法
Document Type and Number:
Japanese Patent JP5055619
Kind Code:
B2
Abstract:
An image forming apparatus includes a sheet size detection device including a sheet width direction regulating member, a sheet conveyance direction regulating member, two levers, a detection sensor, and a pattern supplementing device. The levers each have a concavo-convex pattern and interlock with the regulating members, respectively, and are superimposed to have the same center of rotation and the same locus formed by a leading end of the concavo-convex pattern. The concavo-convex pattern of at least one of the levers is shaped to prevent, in a detection pattern, erroneous detection attributed to positional displacement of the concavo-convex pattern. The detection sensor including push switches detects the sheet size according to a combined concavo-convex pattern formed by the superimposed levers. The pattern supplementing device supplements the concavo-convex pattern of the at least one lever to prevent, in another detection pattern, erroneous detection attributed to the shaping of the concavo-convex pattern.
Inventors:
Masaru Yamagishi
Application Number:
JP2007213943A
Publication Date:
October 24, 2012
Filing Date:
August 20, 2007
Export Citation:
Assignee:
株式会社リコー
International Classes:
B65H1/00
Domestic Patent References:
| JP2006188357A | ||||
| JP8104436A | ||||
| JP2005280994A | ||||
| JP2006137597A |
Attorney, Agent or Firm:
Shogo Honda
Toru Kabayama
Toru Kabayama