Printing machine provided with plate cylinder driving device
AssigneeI.Mer Co., Ltd.
InventorMasayuki Izume
Life of this patent
Estimating the term…
Abstract
Plate cylinder driving devices of a printing machine are provided with a drive shaft driving the plate cylinder, a drive helical gear fixed to the drive shaft, and an anti-backlash helical gear rotatably connected to the drive shaft and is biased by at least a spring towards a direction for preventing backlash. Both the drive helical gear and the anti-backlash helical gear are engaged with the main gear, and a plate provided with plural holes accommodating rollers is provided between the drive helical gear and the anti-backlash helical gear. Friction between the anti-backlash gear and the drive gear is reduced by a simple mechanism in the plate cylinder driving devices in a printing machine.
Claims4
A printing machine comprising a main gear and plate cylinder driving devices driving individual plate cylinders wherein:
- each of said plate cylinder driving devices is provided with a drive shaft driving a plate cylinder, a drive helical gear fixed to the drive shaft, and an anti-backlash helical gear which is rotatably connected to the drive shaft and is biased by at least a spring towards a direction for preventing backlash;
- the drive helical gear and the anti-backlash helical gear are both engaged with the main gear;
- and
- a plate provided with plural holes in which rollers are accommodated is provided between the drive helical gear and the anti-backlash helical gear.
Dependencies are inferred from the claim text.