Boots – shoes – and leggings
Patent
1981-05-05
1984-01-24
Smith, Jerry
Boots, shoes, and leggings
364184, 364900, 271263, 340675, G06F 1546
Patent
active
044280416
ABSTRACT:
A device for preventing irregular supplying of printing sheets in a printing machine in which the supply of two or more printing sheets stuck together is positively prevented even if the quantity of light passing through a printing sheet is changed such as by a change in an original plate. A detection circuit detects the quantity of light passing through the printing sheets. The output of the detection circuit is coupled to a memory circuit which is activated to store a value representing a quantity of light corresponding to a single printing sheet. This operation is performed in advance before a printing operation is started. A control circuit operated by the memory circuit controls the printing machine operation such that the sheet supplying operation is suspended when the quantity of light detected by the detection circuit is less than the value stored in the memory circuit.
REFERENCES:
patent: 3778051 (1973-12-01), Allen et al.
patent: 3779731 (1973-12-01), Pollock et al.
patent: 3793512 (1974-02-01), Lorenzen
patent: 4151410 (1979-04-01), McMillan et al.
patent: 4349269 (1982-09-01), Okada
`Double Document Detect System`, by W. A. Boothroyd, IBM Tech. Discl. Bull., vol. 19, No. 12, May 1977.
Niessen William G.
Ryobi Ltd.
Smith Jerry
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