Sheet feeding or delivering – Delivering – By endless conveyor
Patent
1996-10-16
1998-08-25
Terrell, William E.
Sheet feeding or delivering
Delivering
By endless conveyor
271183, 271197, 271270, B65H 2966, B65H 2968, B65H 2932
Patent
active
057975981
ABSTRACT:
A conveyor system wherein individual sheets are conveyed from a cutter at a given speed, are increased in speed before passing through a vacuum conveyor shingling section, are slowed down at the shingling section, and then normally proceed at a slowed down speed to the stacker which is adapted to stack a fixed number of sheets before discharging a stack. The sheets are basically handled in accordance with the device disclosed in U.S. Pat. No. 4,200,276. The vacuum shingler of the invention includes a slow-down device, such as a smoothing wheel or spring fingers, positioned above the vacuum conveyor section to nip the leading edge of the individual sheets before they contact the vacuum conveyor. The slow-down device acts to reduce the tendency of lightweight paperboard sheets to fold transversely or buckle across their width. The vacuum shingler further includes a controller which operates the vacuum conveyor section at the required speed to maintain the proper degree of shingling based on the sensed individual sheet length. Additionally, the vacuum shingler applies a source of vacuum only to the tail section of the individual sheet to further aid in proper shingling while reducing the tendency of the lightweight paperboard to buckle transversely.
REFERENCES:
patent: 3315956 (1967-04-01), Lyman
patent: 4200276 (1980-04-01), Marschke
patent: 4436302 (1984-03-01), Frye et al.
patent: 4598901 (1986-07-01), Thomas
patent: 4776577 (1988-10-01), Marschke et al.
Marschke Carl R.
Rodewald Dennis W.
Mackey Patrick
Marquip Inc.
Terrell William E.
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