Combination powder applying and/or infrared drying attachment for printing presses
AssigneeAirtech Company, Inc.
InventorDuane A. Schmoeger
Life of this patent
Estimating the term…
Abstract
The attachment is selectively usable to apply heat, anti-offset powder, or both heat and powder to freshly printed sheets passing to the sheet collection station of a printing press. Operation of the heat and/or powder applying assemblies is changed automatically to compensate for changes in the press speed. The location at which heat is applied to the sheets is upstream from that at which powder is applied, and is spaced from the collection station. Shields and air currents assist in regulating heat transfer. A compact housing assembly supports both heat and powder applying components.
Claims20
In combination with a printing press having a frame, sheet delivery means carried by said frame for conducting freshly printed sheets along a path of travel from a printing station to a sheet collection station, and anti-offset means for preventing ink offset between the sheets during collection thereof;
- the improvement in said anti-offset means comprising;
- radiant heating means for, during operation thereof, directing radiant heat energy onto the sheets at a location along said path of travel spaced in an upstream direction from said collection station;
- sheet spraying means disposed closely adjacent said radiant heating means for, during operation thereof, spraying anti-offset material upon the sheets at a location along said path of travel downstream from said first-mentioned location and upstream from said collection station;
- and selector switch means usable by a press operator for enabling operation of either one or both of said heating means and said spraying means.
In combination with a printing press having a frame, sheet delivery means carried by said frame for conducting freshly printed sheets along a path of travel from a printing station to a sheet collection station, and anti-offset means for preventing ink offset between the sheets during collection thereof;
- the improvement in said anti-offset means comprising:
- radiant heating means for, during operation thereof, directing radiant heat energy onto freshly printed surfaces of the sheets at a location along said path of travel spaced in an upstream direction from said collection station;
- sheet spraying means disposed closely adjacent said radiant heating means for, during operation thereof, spraying anti-offset material upon the sheets at a location along said path of travel downstream from said first-mentioned location and upstream from said collection station;
- and control means for detecting changes in the speed of operation of said press, and for automatically effecting compensating changes in the operation of said heating means and said spraying means.
In combination with a printing press having a frame, a printing station and a sheet delivery station carried by said frame, sheet delivery means carried by said frame for conducting freshly printed sheets along a path of travel from said printing station to said sheet collection station, and anti-offset means for preventing ink offset between the sheets during collection thereof, the improvement in said anti-offset means comprising:
- an elongate support assembly mounted upon said frame adjacent said printing station and said path of travel and distal from said collection station;
- at least one radiant heating member carried by said support assembly for, during operation thereof, and directing radiant heat energy onto freshly printed surfaces of the sheets conducted along said path of travel;
- a sheet spraying member carried by said support assembly for, during operation thereof, spraying anti-offset material upon the sheets at a location along said path of travel upstream from said collection station and downstream from the location whereat said radiant heating member directs radiant heat onto the sheets;
- and selector switch means usable by a press operator for enabling operation of either one or both of said heating member and said sheet spraying member.
Dependencies are inferred from the claim text.