Claims
- 1. A method of preparing a substrate for lithographic printing plates comprising brush graining a web of aluminum lithographic printing plate substrate material moving along a path having a slurry of graining particles thereon wherein said brush graining comprises:a. brush graining with at least one graining brush having bristles moving along a first track over said moving web; and b. brush graining with at least one additional graining brush having bristles moving along a second track over said moving web at an angle of at least 5° to said first track.
- 2. A method as recited in claim 1 wherein said first track is along said path.
- 3. A method as recited in claim 1 wherein both said first track and said second track are at angles to said path.
- 4. A method as recited in claim 3 wherein said brush graining in said first track comprises rotary brush graining.
- 5. A method as recited in claim 3 wherein both said brush graining along said first track and said brush graining along said second track comprise rotary brush graining.
- 6. A method as recited in claim 1 wherein at least one of said graining brushes comprises a flexible belt having brush bristles extending therefrom.
- 7. A method as recited in claim 2 wherein said second track is at an angle between 5° and 90° to said first track.
- 8. A method as recited in claim 5 wherein said brush graining along said first track comprises rotary brush graining with at least one rotary brush having an axis of rotation extending transversely across said path.
Parent Case Info
This application is a continuation of application Ser. No. 09/592,354 filed Jun. 12, 2000, now abandoned.
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Number |
Name |
Date |
Kind |
2680938 |
Peterson |
Jun 1954 |
A |
3637359 |
Malloy et al. |
Jan 1972 |
A |
3811227 |
Petrik |
May 1974 |
A |
4063063 |
Funck et al. |
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A |
6273784 |
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B1 |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/592354 |
Jun 2000 |
US |
Child |
10/346606 |
|
US |