Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-07-08
1994-08-09
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356387, G01N 2186
Patent
active
053368983
ABSTRACT:
The method and the device for automatically determining the geometrical dimensions of printing cylinders to be fed to a treatment process is based on the idea of attaching, to a crane installation (1, 10) provided for the cylinder conveyance, an on-off photocell control device (4) which can be lowered vertically and whose vertical displacement distance is determined as count value. As soon as the on-off photocell control device path is interrupted by the printing cylinder (Z) presented, a second counter runs which is stopped again as soon as the on-off photocell control device is cleared again when the lower horizontal tangent to the cylinder casing is reached. From the relationship of the total distance traversed by the on-off photocell control device and the second count value, which specifies the masking-out of the on-off photocell control device by the printing cylinder, not only the precise diameter of the cylinder (Z), but also the position of the cylinder axis can be determined. Vertically and horizontally displaceable clamping jaws (K1, K2) attached to the crane installation (1, 10) can consequently be brought into alignment with the cylinder axis and be displaced horizontally from an outer starting position until the clamping position on the printing cylinder (Z) to be conveyed is reached. A further counting operation determines the displacement path of the clamping jaws (K1, K2), from which the cylinder length can be calculated.
REFERENCES:
patent: 3555288 (1971-01-01), Morenius
patent: 4676648 (1987-06-01), Schulz et al.
patent: 5043588 (1991-08-01), DiGrande et al.
patent: 5090757 (1992-02-01), Huber et al.
Le Que T.
Maschinenfabrik Kaspar Walter GmbH & Co. KG
Nelms David C.
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