PITCH MEASURING APPARATUS

PURPOSE:To reduce improper pitches by providing a scanning head which detects when a mark indicating the pitch on the surface of a sheet passes and a roller encoder which generates pulses proportional in number to the moving distance of a measuring roll. CONSTITUTION:A pitch measuring apparatus 7 ha...

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Bibliographic Details
Main Author KAWAMOTO YASUSHI
Format Patent
LanguageEnglish
Published 06.11.1990
Subjects
CONVEYING
HANDLING THIN OR FILAMENTARY MATERIAL
HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
PACKING
PERFORMING OPERATIONS
PHYSICS
STORING
TESTING
TRANSPORTING
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Summary:PURPOSE:To reduce improper pitches by providing a scanning head which detects when a mark indicating the pitch on the surface of a sheet passes and a roller encoder which generates pulses proportional in number to the moving distance of a measuring roll. CONSTITUTION:A pitch measuring apparatus 7 has a reversible counter built therein. When a scanning head 4 sequentially detects a cut mark 6 indicated every length of one circumference of a gravure cylinder, the distance from the mark 6 to the next mark 6, that is, a pitch is measured by counting the number of pulses generated at that time from an encoder 5. The measured pitch is indicated and at the same time, when the pitch exceeds the maximum and minimum limit values, an alarming buzzer 8 is turned ON.
Bibliography:Application Number: JP19890094783