Back to results
US 6,454,197 B1Granted
Controlling tension in recording media
AssigneeECRM Incorporated
InventorThomas A. Everett
Life of this patent
Estimating the term…
Abstract
Tension is controlled in a recording medium fed from a roll by detecting a rotational velocity of the roll as the recording medium is fed, and applying a torque to the roll to maintain tension in the recording medium. The torque applied by the motor is controlled based on the rotational velocity of the roll.
Claims27
An apparatus for controlling tension in a recording medium fed from a roll, comprising:
- an encoder which detects a rotational velocity of the roll as the recording medium is fed;
- a motor which applies a torque to the roll to maintain tension in the recording medium;
- and
- a controller which controls the torque applied by the motor based on the rotational velocity of the roll.
1 more element
A method of controlling tension in a recording medium fed from a roll, comprising:
- detecting a rotational velocity of the roll as the recording medium is fed;
- applying a torque to the roll to maintain tension in the recording medium;
- and
- controlling the torque applied by a motor based on the rotational velocity of the roll.
1 more element
An imaging system comprising:
- a cassette which holds a roll of recording media;
- pinch rollers which feed a recording medium from the roll in the cassette;
- a roller which holds the recording medium in place to transport the recording medium through an imaging plane defined by a surface of the roller;
- a device which forms an image onto the recording medium at the imaging plane;
- an encoder which detects a rotational velocity of the roll as the recording medium is fed;
- a motor which applies a torque to the roll to maintain tension in the recording medium between the cassette and the pinch rollers;
- and
- a controller which controls the torque applied by the motor based on the rotational velocity of the roll.
5 more elements
An apparatus for controlling tension in a medium fed from a roll, comprising:
- detecting means for detecting a rotational velocity of the roll as the medium is fed;
- applying means for applying a torque to the roll to maintain tension in the medium;
- and
- controlling means for controlling the torque applied by the applying means based on the rotational velocity of the roll.
1 more element
An imaging system comprising:
- a cassette which holds a roll of recording media;
- pinch rollers which feed a recording medium from the roll in the cassette;
- a roller using a vacuum to hold the recording medium in place to transport the recording medium through an imaging plane defined by a surface of the roller;
- a punch operationally positioned between said pinch rollers and said roller for forming holes in the recording medium;
- a device which forms an image onto the recording medium at the imaging plane;
- an encoder which detects a rotational velocity of the roll as the recording medium is fed;
- a motor which applies a torque to the roll to maintain a substantially uniform tension in the recording medium between the cassette and the pinch rollers;
- and
- a controller which controls the torque applied by the motor based on the rotational velocity of the roll.
6 more elements
Dependencies are inferred from the claim text.