Printing press with on-edge web tension control

• US 20090044712A1
• Filed: 08/16/2007
• Published: 02/19/2009
• Est. Priority Date: 08/16/2007
• Status: Abandoned Application

• Current Assignee: Goss International Americas Incorporated (City of Shanghai)
• Original Assignee: Goss International Americas Incorporated (City of Shanghai)
• Inventors: Milliken, Brian James
• Application Number:
  US11/893,674
• Publication Number:
  US 20090044712A1
• Time in Patent Office: Days
• US Class Current: 101/228
• CPC Class Codes: B65H 23/038 by rollers
• CPC Class Codes: B65H 2301/3113 vertical
• CPC Class Codes: B65H 2301/3251 vertical axis
• CPC Class Codes: B65H 2406/361 distributing vacuum from stationary element to movable element
• CPC Class Codes: B65H 2801/21 Industrial-size printers, e.g. rotary printing press

Abstract

A web printing press is provided including printing units and a vacuum cantilever lead roll having a vertical rotational axis. Methods are also provided.

Claims

1. A web printing press comprising:

printing units; and

a vacuum cantilever lead roll having a vertical rotational axis.

2. The web printing press as recited in claim 1 further comprising a vacuum pump attached to the vacuum cantilever lead roll.

3. The web printing press as recited in claim 1 wherein the vacuum cantilever lead roll has a fixed inner shell and a rotating outer shell.

4. The web printing press as recited in claim 3 wherein the vacuum cantilever lead roll further includes bearings between the fixed inner shell and the rotating outer shell.

5. The web printing press as recited in claim 3 wherein the vacuum cantilever lead roll further includes shields between the fixed inner shell and the rotating outer shell.

6. The web printing press as recited in claim 1 further comprising:

a transducer roll; and

a controller;

the controller receiving an input from the transducer roll; and

the controller controlling a vacuum pressure in the vacuum cantilever lead roll as a function of the input.

7. The web printing press as recited in claim 1 wherein the transducer roll is upstream of the vacuum cantilever lead roll.

8. A method for webbing up a web on-edge comprising:

applying vacuum pressure to a web using a vacuum cantilever lead roll; and

pulling the web by hand past the vacuum cantilever lead roll.

9. A method for holding a web on-edge during printing comprising:

applying vacuum pressure to a web using a vacuum cantilever lead roll;

measuring a web tension; and

controlling the vacuum pressure as a function of the web tension.