1. A device unit detachably provided to an image forming apparatus having a control unit configured to control the image forming apparatus, the device unit comprising:
a CPU configured to communicate with the control unit; and
a memory configured to store property information including information provided through a communication between the CPU and the control unit, the memory including:
a write-prohibited area configured to prohibit information overwriting, and
a first writable area configured to allow information writing.
2. The device unit according to claim 1, wherein the memory further comprises a second writable area configured to controllably prohibit or allow a one time overwriting of information therein.
3. The device unit according to claim 2, wherein the second writable area of the memory is configured to allow a one time overwriting of information therein when the device unit recognizes a predetermined code transmitted from the control unit.
4. The device unit according to claim 2, wherein the write-prohibited area, the first writable area, and the second writable area of the memory are allocated in a way corresponding to product group identifications.
5. The device unit according to claim 1, wherein the write-prohibited area of the memory is configured to cancel the prohibition of information overwriting.
6. The device unit according to claim 5, wherein the write-prohibited area of the memory is configured to allow a one time overwriting of information therein when the device unit recognizes a predetermined code transmitted from the control unit.
7. The device unit according to claim 1, wherein the memory is included in an IC tag detachably provided to the device unit.
8. The device unit according to claim 1, further comprising at least one of an image carrying member, a charging device, a developing device, a transfer device, and a cleaning device.
9. The device unit according to claim 1, wherein the write-prohibited area of the memory stores information relating to image forming conditions.
10. The device unit according to claim 1, further comprising a developer cartridge configured to store developer.
11. The device unit according to claim 1, wherein the write-prohibited area of the memory stores information relating to manufacturing of the device unit.
12. The device unit according to claim 1, wherein the first writable area of the memory stores information relating to an operational history of the device unit.
13. The device unit according to claim 1, wherein the memory further comprises a second writable area configured to controllably prohibit or allow a one time overwriting of information therein, and the second writable area stores information relating to a start time of using the device unit.
14. The device unit according to claim 1, wherein the memory includes a nonvolatile memory.
15. An image forming apparatus, comprising:
a control unit configured to control the image forming apparatus and including a memory; and
a device unit including a CPU configured to communicate with the control unit, and a memory configured to store property information including information provided through a communication between the CPU and the control unit, the memory including:
a write-prohibited area configured to prohibit information overwriting; and
a first writable area configured to allow information writing.
16. The image forming apparatus according to claim 15, wherein the image forming apparatus is coupled to a management system which administers operational status of the image forming apparatus via a public telecommunication line or Internet, and is configured to transmit information stored in the memory to the management system via the public telecommunication line or the Internet.
17. The image forming apparatus according to claim 15, wherein the image forming apparatus is coupled to a management system which administers operational status of the image forming apparatus via a public telecommunication line or Internet, and is configured to receive information from the management system via the public telecommunication line or the Internet, and to store the information from the management system into the memory.
18. The image forming apparatus to claim 15, wherein the memory includes a nonvolatile memory
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A method for reducing vibrations in a printing press, the printing press having a first plate cylinder independently registrable from a second print cylinder, the first plate cylinder being operatively connected to at least one first laterally-moving vibrator roll and the second plate cylinder being operatively connected to at least one second laterally-moving vibrator roll, the method comprising the steps of:
determining a lateral position of the first vibrator roll with respect to the second vibrator roll; and
rotating the first plate cylinder with respect to the second plate cylinder so as to change the lateral position of the first vibrator roll with respect to the second vibrator roll.
2. The method as recited in claim 1 wherein the rotating step includes rotating either the first or second plate cylinder so that a circumferential register of the first or second plate cylinder is not altered.
3. The method as recited in claim 2 wherein the first or second plate cylinder is rotated a plurality of single rotations of 360 degrees.
4. The method as recited in claim 1 further comprising determining a desired phase difference between the first and second vibrator rolls, the rotating step including rotating the first or second plate cylinder a number of rotations to achieve the desired phase difference.
5. The method as recited in claim 4 further comprising feeding back a lateral position of the first vibrator roll to a controller, the controller controlling the rotating step.
6. The method as recited in claim 4 wherein the determining step is performed using a mathematical model.
7. The method as recited in claim 4 wherein the determining step is performed by measuring actual vibrations.
8. The method as recited in claim 1 wherein the first vibrator roll is phased a 180 degrees from the second vibrator roll after the rotating step.
9. A method for reducing vibrations in a printing press, the printing press having a first plate cylinder independently registrable from a second print cylinder, the first plate cylinder being operatively connected to-at least one first laterally-moving vibrator roll and the second plate cylinder being operatively connected to at least one second laterally-moving vibrator roll, the method comprising the steps of:
determining a desired lateral position of the first vibrator roll with respect to the second vibrator roll as a function of actual or predicted vibration of the printing press; and
rotating the first plate cylinder with respect to the second plate cylinder so as to change the lateral position of the first vibrator roll with respect to the second vibrator roll to the desired lateral position.
10. A printing press comprising:
a first plate cylinder;
at least one first vibrator roll operatively connected to the first plate cylinder, the first vibrator roll being part of an inking unit or a dampening unit, the first vibrator roll moving laterally a certain amount for each rotation of the first plate cylinder;
a second plate cylinder independently registrable with respect to the first plate cylinder in a circumferential direction;
at least one second vibrator roll operatively connected to the second plate cylinder, the second vibrator roll being part of another inking unit or another dampening unit, the second vibrator roll moving laterally a certain amount for each rotation of the second plate cylinder;
at least one sensor for sensing at least one of a lateral position of the first vibrator roll with respect to the second vibrator roll and a vibration of the printing press; and
a controller receiving an input from the at least one sensor, the controller rotating the first plate cylinder with respect to the second plate cylinder so as to alter a phase between the first vibrator roll and the second vibrator roll as a function of the input.
11. The printing press as recited in claim 10 farther comprising a first blanket cylinder connected to the first plate cylinder and a second blanket cylinder connected to the second plate cylinder.
12. The printing press as recited in claim 10 further comprising a first motor driving the first plate cylinder and the first vibrator roll and a second motor driving the second plate cylinder and the second vibrator roll.
13. The printing press as recited in claim 10 wherein the at least one first vibrator roll includes at least two vibrator rolls.
14. The printing press as recited in claim 10 wherein the press is an offset lithographic printing press.
15. The printing press as recited in claim 10 wherein the at least one sensor includes a sensor sensing a first vibrator roll lateral position and a second sensor sensing a second vibrator roll lateral position.
16. The printing press as recited in claim 15 wherein the at least one sensor farther includes an accelerometer measuring the vibration.
17. The printing press as recited in claim 10 wherein the at least one sensor includes an accelerometer.