Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Plotter with drive rollers having variable radial contact surfaces










Image Number 5 for United States Patent #5138341.

A plotter wherein, while a sheet is being moved on a recording surface, figures, characters etc. are automatically depicted on the surface of the sheet, or the contours of figures, characters etc. are automatically cut in the surface of the sheet. In the plotter, both the side edges of the sheet are respectively held between drive rollers and corresponding pinch rollers mounted at both the sideward parts of the recording surface in opposition to each other, and the drive rollers at both the sideward parts of the recording surface are rotated synchronously to each other, whereby the sheet is moved in the rotating direction of the drive rollers on the recording surface. Each of the drive rollers is formed at its peripheral surface with milling or ruggedness for preventing the sheet from slipping. The plotter comprises piston-cylinder assemblies and associated springs for regulating respective pressures acting to press the pinch rollers at both the sideward parts of the recording surface against the surface of the sheet. It also comprises sensors for sensing the directions and degrees of the wobbles of the sheet moving on the recording surface, and a controller for controlling the lengths of the springs in accordance with the direction and degree of the wobble of the sheet sensed by the sensors, thereby to regulate the respective pressures acting to press the pinch rollers at both the sideward parts of the recording surface against the sheet surface. When the sheet has begun to wobble, the direction and degree of the wobble are sensed by the sensors, and the pressure acting to press the pinch roller against the sheet surface is increased or decreased, thereby to correct the moving orbit of the sheet.








 
 
  Recently Added Patents
Battery module and method for cooling the battery module
Method for solubilising, dispersing and stabilising of substances, products manufactured according to the method as well as the use thereof
End user controlled temporary phone service device swapping system and method
Stacked memory device for a configurable bandwidth memory interface
High speed solid-state relay with controller
Pixel circuit and display device
CMOS integrated micromechanical resonators and methods for fabricating the same
  Randomly Featured Patents
Water heater stand and assembly thereof
Ratiometric stud sensing
SECAM Chroma demodulator circuit
System and method for wireless electrical power transmission
Methods of dry powder inhalation
Lift device for wheelchairs
Device for a torque or shear force transmitter for the determination of fibre concentration or viscosity in pulp suspensions and method for resetting of the transmitter shaft in a torque or sh
Herbicidal and fungicidal substituted triazolinones
Compositions and methods for the generation of protective immune responses against malaria
Control pod for a communications headset