Advancing material of indeterminate length – Threading device
Patent
1976-03-22
1977-05-10
Lindsay, Jr., Robert L.
Advancing material of indeterminate length
Threading device
162286, 162289, 162306, 162363, 226 95, 226 97, 271197, G03B 156
Patent
active
040223663
ABSTRACT:
An apparatus for transporting a sheet of a flexible material between a first and a second position. The apparatus includes an elongated frame and an air-pervious endless belt movably mounted on first and second pulleys positioned at each end of the frame. The belt has its upper rung travelling from the first pulley, adjacent the first position, to the second pulley, adjacent the second position, and is arranged to receive a lead strip of the sheet from the first position. A vacuum chest having a perforated top extends longitudinally of and below the upper rung of the belt. There are means for evacuating air from the chest in order to apply a vacuum at the undersurface of the belt and thereby cause the lead strip to cling to the belt. The apparatus has means defining an opening where the sheet leaves the belt and an air jet means able to direct air through the opening. The air is directed contrary to the direction of movement of the belt and with a velocity sufficient both to overcome any gripping effect of air entrained within the air-pervious belt and to lift the sheet of flexible material.
REFERENCES:
patent: 1262698 (1918-04-01), Pope
patent: 1369124 (1921-02-01), Pope
patent: 3355349 (1967-11-01), Devlin
patent: 3502407 (1970-03-01), Granzow et al.
patent: 3712558 (1973-01-01), Johnson et al.
Baumann, "Variable Radius Air Bearing", IBM Technical Disclosure Bulletin, vol. 15, No. 6, Nov. 1972.
Durad Machine Company Ltd.
Lindsay, Jr. Robert L.
Yeung George C.
LandOfFree
Sheet handling apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sheet handling apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sheet handling apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1979084