Printing plate pressure adjustment system and can decorator employing same

Patent metadata

Field	Value
Publication number	US-12168342-B2
Application number	US-202318196051-A
Country	US
Kind code	B2
Filing date	May 11, 2023
Priority date	Jun 24, 2021
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

A printing plate pressure adjustment system for a can decorator including a printing plate cylinder assembly having a printing plate cylinder drive shaft, and a blanket wheel. The system, includes an actuator, a control system structured to control operation of the actuator to adjust a pressure, between the printing plate cylinder assembly and the blanket wheel, an eccentric bushing disposed around the printing plate cylinder drive shaft, wherein rotation of the eccentric bushing causes the printing plate cylinder to move toward or away from the blanket wheel, and a drive mechanism coupled between the actuator and the eccentric bushing, wherein operation of the actuator causes the drive mechanism to rotate the eccentric bushing.

First claim

What is claimed is:

1. A printing plate pressure adjustment system for a can decorator including a printing plate cylinder assembly having a printing plate cylinder, a printing plate cylinder drive shaft, and a blanket wheel, said system comprising:
an actuator;
a control system structured to control operation of the actuator to adjust a pressure between the printing plate cylinder assembly and the blanket wheel;
an eccentric bushing disposed around the printing plate cylinder drive shaft, wherein rotation of the eccentric bushing causes the printing plate cylinder to move toward or away from the blanket wheel; and
a drive mechanism coupled between the actuator and the eccentric bushing, the drive mechanism including an elongated member coupled to the eccentric bushing, wherein operation of the actuator causes the elongated member to move to rotate the eccentric bushing,
wherein the control system is structured to adjust the pressure between the printing plate cylinder and the blanket wheel to a desired pressure,
wherein the control system is structured to control the actuator such that the printing plate cylinder moves away from the blanket wheel in a large step greater than 0.001 inch and to subsequently control the actuator such that the printing plate cylinder moves toward the blanket wheel in fine incremental steps of less than 0.001 inch until the desired pressure between the printing plate cylinder assembly and the blanket wheel is reached.

2. The printing plate pressure adjustment system of claim 1 , wherein the actuator is an air motor.

3. The printing plate pressure adjustment system of claim 1 , wherein the drive mechanism comprises:
a worm gear structured to rotate in response to operation of the actuator, wherein rotation of the worm gear causes the elongated member to move.

4. The printing plate pressure adjustment system of claim 3 , wherein the drive mechanism further comprises:
a drive shaft coupled to the actuator and structured to move linearly in response to operation of the actuator; and
a worm drive gear coupled to the drive shaft and structured to interact with the worm gear to rotate the worm gear in response to linear movement of the drive shaft.

5. The printing plate pressure adjustment system of claim 1 , wherein the drive mechanism comprises:
an eccentric pivot operatively structured to rotate in response to operation of the actuator, wherein the elongated member is coupled between the eccentric pivot and the eccentric bushing, and wherein rotation of the eccentric pivot causes the elongated member to move.

6. The printing plate pressure adjustment system of claim 1 , further comprising:
an eccentric bushing bracket coupled between the eccentric bushing and the elongated member.

7. The printing plate pressure adjustment system of claim 1 , further comprising:
a sensor target coupled to the eccentric bushing and structured to move in conjunction with rotation of the eccentric bushing; and
a sensor structured to sense a position of the sensor target,
wherein the control system is structured to control operation of the actuator based on an output of the sensor.

8. The printing plate pressure adjustment system of claim 7 , wherein a predetermined position of the sensor target corresponds to thea desired pressure between the printing plate cylinder assembly and the blanket wheel, and wherein the control system is structured to control the actuator such that the position of the sensor target is the predetermined position corresponding to the desired pressure between the printing plate cylinder assembly and the blanket wheel.

9. The printing plate pressure adjustment system of claim 1 , wherein the control system is structured to control the actuator based on an input from an external control system.

10. The printing plate pressure adjustment system of claim 9 , wherein the external control system is located remotely from the can decorator.

11. A printing plate pressure adjustment system for a can decorator including a printing plate cylinder assembly having a printing plate cylinder, a printing plate cylinder drive shaft, and an eccentric bushing disposed around the printing plate cylinder drive shaft, and a blanket wheel, wherein rotation of the eccentric bushing causes the printing plate cylinder to move toward or away from the blanket wheel, said system comprising:
an actuator;
a drive mechanism coupled between the actuator and the eccentric bushing, the drive mechanism including:
an elongated member coupled to the eccentric bushing, wherein operation of the actuator causes the elongated member to move to rotate the eccentric bushing; and
a worm gear structured to rotate in response to operation of the actuator,
wherein rotation of the worm gear causes the elongated member to move,

wherein the actuator is an air motor; and wherein the drive mechanism further comprises:
an eccentric pivot operatively structured to rotate in response to operation of the actuator, wherein the elongated member is coupled between the eccentric pivot and the eccentric bushing, and wherein rotation of the eccentric pivot causes the elongated member to move.

12. The printing plate pressure adjustment system of claim 11 , wherein the drive mechanism further comprises:
a drive shaft coupled to the actuator and structured to move linearly in response to operation of the actuator; and
a worm drive gear coupled to the drive shaft and structured to interact with the worm gear to rotate the worm gear in response to linear movement of the drive shaft.

13. A can decorator comprising:
a blanket wheel;
a printing plate cylinder assembly having a printing plate cylinder, a printing plate cylinder drive shaft, and an eccentric bushing disposed around the printing plate cylinder drive shaft, wherein rotation of the eccentric bushing causes the printing plate cylinder to move toward or away from the blanket wheel; and
a printing plate pressure adjustment assembly including:
an actuator;
a control system structured to control operation of the actuator to adjust a pressure between the printing plate cylinder assembly and the blanket wheel; and
a drive mechanism coupled between the actuator and the eccentric bushing, the drive mechanism including an elongated member coupled to the eccentric bushing, wherein operation of the actuator causes the elongated member to move to rotate the eccentric bushing,

wherein the control system is structured to adjust the pressure between the printing plate cylinder and the blanket wheel to a desired pressure,
wherein the control system is structured to control the actuator such that the printing plate cylinder moves away from the blanket wheel in a large step greater than 0.001 inch and to subsequently control the actuator such that the printing plate cylinder moves toward the blanket wheel in fine incremental steps of less than 0.001 inch until the desired pressure between the printing plate cylinder assembly and the blanket wheel is reached.

14. The can decorator of claim 13 , wherein the actuator is an air motor.

15. The can decorator of claim 13 , wherein the drive mechanism comprises:
a worm gear structured to rotate in response to operation of the actuator, wherein rotation of the worm gear causes the elongated member to move.

16. The can decorator of claim 13 , wherein the drive mechanism comprises:
an eccentric pivot operatively structured to rotate in response to operation of the actuator, wherein the elongated member is coupled between the eccentric pivot and the eccentric bushing, and wherein rotation of the eccentric pivot c

Assignees

• Stolle Machinery Co Llc

Inventors

• Kajfosz Bryon Lee
• Sebesta David Matthew
• Fleischer Karl Scott

Classifications

• B41F17/14

  on articles of finite length · CPC title

• B41M1/40

  Printing on bodies of particular shapes, e.g. golf balls, candles, wine corks {(sublimation or volatilisation of pre-printed design B41M5/035)} · CPC title

• B41M1/28

  on metals · CPC title

• B41F33/0072

  Devices for measuring the pressure between cylinders or bearer rings · CPC title

• B41F3/80 Primary

  for impression cylinders · CPC title