Apparatus and method for registering silk screens
OwnerDaniel J. Elliotinventor
Life of this patent
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Abstract
Printing screens are registered using a photosensitive position locating sensor which is affixed to a pallet and aligned with the image of a register mark on the first of a series of printing screens. The location of the image is stored and signalled in a display device. The pallet is then roughly aligned with a second and subsequent screens of the series. The subsequent screens are each moved until the image of its register mark is superimposed upon the stored image. The signal output from the sensor is applied to a microprocessor which controls the display device.
Claims12
Apparatus for displaying the location of an applied light pattern to a sensor, comprising in combination:
- (1) sensor means capable of signalling relative location of an impinging light pattern;
- (2) data processing means coupled to said sensor means and responsive thereto for generating display signals, including signal storage means for holding display signals corresponding to a selected location;
- (3) actuatable means coupled to said data processing means for storing selected display signals in said storage means;
- and
- (4) display means coupled to said data processing means and having a first display mode responsive to stored display signals for providing a first visual presentation corresponding to and representative of the selected location, and a second display mode responsive to display signals for providing a second visual presentation representative of the location of the impinging light pattern currently being applied to said sensor means,
- whereby with manipulation of the source of impinging light patterns, the first mode presentation and the second mode presentation are brought into superimposing correspondence which indicates that a prior location of an impinging light pattern and the present location of a currently presented light pattern are in a predetermined alignment.
A method for displaying the location of an applied light pattern to a sensor, comprising the steps of:
- a) applying a first reference light pattern to a sensor capable of signalling the relative location of impingement;
- b) processing said sensor signals to create a visual display corresponding to the location of the first reference pattern relative to the sensitive area of the sensor;
- c) selectively storing the processed sensor signals corresponding to the location of the first reference pattern;
- d) displaying in a first distinctive display mode a representation of the selected reference location corresponding to said stored processed sensor signals;
- e) applying a second light pattern to said sensor;
- f) processing said sensor signals to create a visual display corresponding to the location of the second pattern;
- g) displaying in a second distinctive display mode a representation of the location of the second pattern from said processed sensor signals corresponding to said second pattern;
- h) manipulating the source of the second light pattern until the light pattern as represented by the visual display in the second distinctive mode corresponds in a predetermined manner with the visual display in the first distinctive mode,
- whereby when the first and second distinctive mode displays correspond in the predetermined manner, the sources of the reference and second light patterns are also in a predetermined correspondence.
Dependencies are inferred from the claim text.