Sheet positioning, clamping, and tensioning means
AssigneeEastman Kodak Company
InventorCor Lubberts
Life of this patent
Estimating the term…
Abstract
A sheet to be clamped includes registration holes at its edges. The leading and trailing ends of the sheet are superimposed, then positioned and clamped with respect to a cylinder by means of a clamping bar. The sheet is tensioned by use of an adjustable tensioner rod. Vernier-type scales on the sheet and cylinder aid in measuring and setting the desired tension. A longitudinal edge of the sheet is located by pins suitably located on the cylinder. In alternative embodiments, the clamping bar and tensioner rod are combined in a unit, or the clamping bar is formed in split sections to receive the sheet therebetween.
Claims21
Apparatus for receiving, positioning, clamping, and tensioning a sheet onto a cylinder, said sheet having first and second opposing ends each of which having sheet-locating indicia, comprising:
- locating means, cooperative with said indicia when said first and second ends of the received sheet are superimposed, for locating said first and second ends in a predetermined configuration;
- means for clamping said superimposed and located first and second opposing ends to the cylinder;
- means for adjustably tensioning the clamped sheet;
- and
- means for detecting the tension in the clamped sheet, said detecting means comprising:
- means defining a vernier scale on said cylinder, said vernier scale being located adjacent a lateral edge of a received sheet and cooperating with means defining a similar vernier scale located on said sheet along such lateral edge to provide a visual indication of sheet tension.
Apparatus for receiving, positioning, clamping, and tensioning a sheet onto a cylinder, said sheet having first and second opposing ends each of which having plural end-locating apertures therein, and said sheet having a longitudinal edge having an edge-locating aperture therein, comprising:
- first locating means, cooperative with said end-locating apertures when said first and second ends of the received sheet are superimposed, for locating said first and second ends in a predetermined configuration;
- second locating means, cooperative with said edge-locating apertures for locating said longitudinal edge in a predetermined configuration;
- means for clamping said superimposed and located first and second opposing ends to the cylinder;
- means for adjustably tensioning the clamped sheet;
- and
- means for detecting the tension in the clamped sheet, said detecting means comprising:
- means defining a vernier scale on said cylinder, said vernier scale being located adjacent a lateral edge of a received sheet and cooperating with means defining a similar vernier scale located on said sheet to provide a visual indication of sheet tension.
Dependencies are inferred from the claim text.