Conveying sheets at non-uniform speed

Details Conveying sheets at non-uniform speed Conveying sheets at non-uniform speed

1974-09-18

1976-11-16

Blunk, Evon C.

Glass manufacturing

Control responsive to condition sensing means

Speed control

65254, 198461, 198579, C03B 3500

Patent

active

039921824

ABSTRACT:
A system for conveying a series of glass sheets at a non-uniform speed through sheet treatment apparatus comprising a plurality of treatment stations. Longitudinally spaced conveyor rolls are rotated at a first speed at a first sheet treatment station where each sheet in turn is oriented and aligned properly relative to said conveying system and other rolls are rotated at a greater speed at a second sheet treatment station where the properly oriented and aligned sheet is treated. A plurality of clutch means selectively and simultaneously engage different subseries of a selected series of the conveyor rolls to rotate the selected series of rolls at said greater speed to transfer each sheet in succession to the second treatment station as rapidly as possible and then disengage each clutch means according to a predetermined time cycle that can be adjusted to accommodate for transferring glass sheets of different lengths to cause the rolls of each different subseries of the selected series of rolls in sequence to resume the first speed whenever the trailing edge of said glass sheet passes beyond its controlled subseries of rolls. This system reduces the overall length of the conveyor needed to move the series of glass sheets through several treatment stations and provides minimum marking on the glass sheet surfaces supported by the conveyor rolls by minimizing the proportion of glass sheet simultaneously engaged by rolls rotating at different rotational speeds. This system also minimizes the tendency of the sheets to become cocked or misaligned if they are not rectangular in outline.

REFERENCES:
patent: 3254778 (1966-06-01), Marland et al.
patent: 3315860 (1967-04-01), Adams et al.
patent: 3338493 (1967-08-01), Schiffer
patent: 3404658 (1968-10-01), French et al.
patent: 3701643 (1972-10-01), Frank
patent: 3706370 (1972-12-01), Bonafino et al.

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