Method and apparatus for adjusting a gap between a printing head and a printing medium
AssigneeCanon Kabushiki Kaisha
InventorHitoshi Katsuyama
Life of this patent
Estimating the term…
Abstract
Two roller members support an endless conveying member tensioned around them, where the endless conveying member conveys a printing medium. A first displacing unit displaces a first portion of the endless conveying member in the direction different from the traveling direction of the endless conveying member and a second displacing unit displaces a second portion of the endless conveying member opposite to the first portion in accordance with the displacement of the endless conveying member made by the first displacing unit. The first displacing unit is arranged to displace the portion of the endless conveying member which faces the printing head.
Claims10
A printing apparatus for printing with a printing head on a printing medium conveyed by an endless conveying member, comprising:
- two roller members supporting the endless conveying member, the endless conveying member being tensioned around said two roller members;
- a first displacing unit arranged between said two roller members and pressing the endless conveying member, the first displacing unit displacing a first portion of the endless conveying member facing the printing head in directions separating from and approaching toward the printing head;
- a second displacing unit arranged between said two roller members and pressing the endless conveying member, the second displacing unit displacing a second portion of the endless conveying member opposite to the first portion of the endless conveying member displaced by said first displacing unit in the directions separating from and approaching toward the printing head;
- and
- means for moving said second displacing unit together with said first displacing unit and relative to said two roller members supporting the endless conveying member, while maintaining a distance between said first displacing unit and said second displacing unit substantially constant.
A method of adjusting a gap between a printing head and a printing medium conveyed by an endless conveying member, said method comprising the steps of:
- supporting the endless conveying member around two roller members such that the endless conveying member is tensioned around the two roller members;
- providing a first displacing unit arranged between the two roller members and pressing the endless conveying member, the first displacing unit for displacing a first portion of the endless conveying member facing the printing head in directions separating from and approaching toward the printing head;
- providing a second displacing unit arranged between the two roller members and pressing the endless conveying member, the second displacing unit for displacing a second portion of the endless conveying member opposite to the first portion of the endless conveying member displaced by the first displacing unit in the directions separating from and approaching toward the printing head;
- and
- moving the second displacing unit together with the first displacing unit and relative to the two roller members supporting the endless conveying member, while maintaining a distance between the first displacing unit and the second displacing unit substantially constant.
Dependencies are inferred from the claim text.