Cylinder for a sheet-treating and/or sheet-processing machine with suction air openings and machine for treating and/or processing sheet-format substrate comprising such a cylinder

Patent metadata

Field	Value
Publication number	US-12384144-B2
Application number	US-202318867821-A
Country	US
Kind code	B2
Filing date	Aug 2, 2023
Priority date	Oct 21, 2022
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

Examples include a cylinder having a holding means around the circumference and by which a substrate sheet can be picked up and held during rotation of the cylinder over a rotation angle range between when the substrate sheet is received and is transferred downstream. A rotary union includes a rotor rotating along with the cylinder which, at an end face, is arranged with a stator that does not rotate during regular operation. A vacuum pressure can be applied via the rotary union to suction openings provided around the circumference of the cylinder while running through an active rotation angle phase of the cylinder. The rotary union can be set in terms of a size of a passage angle sector determining the size of the active rotation angle phase and/or in terms of a position of the passage angle sector determining the position of the active rotation angle phase.

First claim

The invention claimed is:

1. A cylinder ( 26 ; 17 ; 152 ; 12 ) for a sheet-treating and/or sheet-processing machine ( 01 ), the cylinder ( 26 ; 17 ; 152 ; 12 ) comprising a holding means ( 33 ) around a circumference thereof, by which a substrate sheet ( 02 ) to be conveyed over the cylinder ( 26 ; 17 ; 152 ; 12 ) can be picked up at a leading end thereof and can be or is held during a rotation of the cylinder ( 26 ; 17 ; 152 ; 12 ) over a rotation angle range between when the substrate sheet ( 02 ) is received and when the substrate sheet ( 02 ) is transferred downstream, the cylinder ( 26 ; 17 : 152 ; 12 ) further comprising a rotary union ( 123 ), which comprises a rotor ( 124 ) rotating along with the cylinder ( 26 ; 17 ; 152 ; 12 ) which, at an end face, is non-rotatably arranged at a shaft end ( 128 ) of a shaft ( 32 ) driving the cylinder ( 26 ; 17 ; 152 ; 12 ) or at an end-face cylinder journal ( 128 ), as well as a stator ( 126 ) that does not rotate during regular operation, the rotary union ( 123 ) configured to enable vacuum pressure to be applied to suction openings ( 42 ) or groups of suction openings ( 42 ) provided around the circumference of the cylinder ( 26 ; 17 ; 152 ; 12 ) while an active rotation angle phase of the cylinder ( 26 ; 17 ; 152 ; 12 ) about an axis of rotation (R) thereof is being run through, characterized in that
the rotary union ( 123 ) can be set in terms of a size of a passage angle sector (Df) determining a size of the active rotation angle phase and/or in terms of a position of the passage angle sector (Df) determining a position of the active rotation angle phase; and
that the stator ( 126 ) is configured as a multi-piece stator ( 126 ) comprising a first stator part ( 131 ) and a second stator part ( 132 ), which can both be adjusted, in terms of a rotational position thereof with respect to one another and relative to an axis of rotation, about the axis of rotation (R) of the cylinder ( 26 ; 17 ; 152 ; 12 ) or an axis coinciding therewith.

2. The cylinder according to claim 1 , characterized in that the rotary union ( 123 ) has a multi-channel design on a side of the rotor ( 124 ), including line connections which originate on a cylinder side from channel openings ( 127 ) of the multi-channel rotor ( 124 ) leading to different suction openings ( 42 ) or groups of suction openings ( 42 ) located one behind the other in a circumferential direction.

3. The cylinder according to claim 2 , characterized in that the stator ( 126 ) comprises a recess ( 129 ) or a group of recesses ( 129 ) used for passage of suction air, which, depending on a rotational position of the rotor ( 124 ) rotating along with the cylinder ( 26 ), is in alignment with a changing part of the channel openings ( 127 ) of the rotor ( 124 ).

4. The cylinder according to claim 3 , characterized in that the stator ( 126 ) comprising the recess ( 129 ) or group of recesses ( 129 ), for varying the position of the passage angle sector (Df) and thus the position of the defined rotation angle phase and/or for varying the position of the channel openings ( 127 ) which at the same time are in alignment with the recess ( 129 ) or group of recesses ( 129 ), and the suction openings ( 42 ) or groups of suction openings ( 42 ) having a line connection thereto, can be pivoted about the axis of rotation (R) of the cylinder ( 26 ) or an axis coinciding therewith.

5. The cylinder according to claim 3 , characterized in that the stator ( 126 ) is configured as a multi-piece stator ( 126 ) comprising a first stator part ( 131 ) including a recess ( 129 ) or a group of recesses ( 129 ), and a second stator part ( 132 ) comprising a cover element ( 133 ), the first and second stator parts ( 131 , 132 ), for varying the size of the passage angle sector (Df) and thus the size of the defined rotation angle phase and/or for varying a size of the free passage cross-section through the recess ( 129 ), and thus a portion of the channel openings ( 127 ) that are simultaneously in alignment with this recess ( 129 ), are arranged so as to be variable in terms of a relative rotational position thereof.

6. The cylinder according to claim 5 , characterized in that the second stator part ( 132 ) can be pivoted relative to the first stator part ( 131 ) and/or comprises a blocking element ( 134 ) engaging in the recess of the first stator part ( 131 ), which separates a part of the recess ( 129 ) not covered by the cover element ( 133 ) from a covered part of the recess ( 129 ).

7. The cylinder according to claim 2 , characterized in that the stator ( 126 ), for conducting through suction air, is configured with a recess ( 129 ) or a group of recesses ( 129 ) in such a way that, during a rotation of the cylinder ( 26 ; 17 ; 152 ; 12 ) and of the rotor ( 124 ) of the rotary union ( 123 ) which rotates along with the cylinder, always only that part of the channel openings ( 127 ) has a line connection to a free cross-section of the recess ( 129 ) or groups of recesses ( 129 ) of the stator ( 126 ) which is connected via corresponding line paths to suction openings ( 42 ) or groups of suction openings ( 42 ) which are located within the rotation angle phase of the cylinder ( 26 ; 17 ; 152 ; 12 ) about the axis of rotation (R) thereof of less than 360°.

8. The cylinder according to claim 1 , characterized in that the position and size of the passage angle sector (Df) determining the size and the position of the active rotation angle phase and/or a beginning and an end of the active rotation angle phase, across at least a respective adjustment range, can be selected or set by a positioning of the two stator parts ( 131 ; 132 ) with respect to one another and the respective angular position thereof assumed about the axis of rotation or an axis coinciding therewith.

9. The cylinder according to claim 1 , characterized in that the second stator part ( 132 ) can be pivoted by way of adjusting means ( 137 , 139 ) relative to the first stator part ( 131 ) and/or about the axis of rotation (R) of the cylinder ( 26 ) or an axis coinciding therewith and/or that the first stator part ( 131 ) can be pivoted by way of adjusting means ( 136 , 141 ) about the axis of rotation (R) of the cylinder ( 26 ) or an axis coinciding therewith and/or relative to the second stator part ( 132 ).

10. The cylinder according to claim 1 , characterized by the design thereof as a magnetic cylinder ( 26 ) comprising a number of n×m (where n, m 0 ┐) magnetic elements ( 24 ), arranged in a matrix-like manner, in a region of an outer circumference thereof, which are arranged in axially parallel extending rows and in columns extending in a circumferential direction.

11. The cylinder according to claim 10 , characterized in that a plurality or all of the magnetic elements ( 24 ) of the columns extending in the circumferential direction are arranged at or on a respective carrier element ( 31 ), which is open or closed in a ring-like manner and accommodated on a cylinder shaft ( 32 ), the ring-like carrier element ( 31 ), viewed in the circumferential direction, comprising a plurality of chambers ( 55 ) one behind the other, which each, independently of one another, have a line connection to the rotor ( 124 ) of the rotary union ( 123 ) and to at least one group of suction openings ( 42 ) joining at the circumference via corresponding line paths.

12. The cylinder according to claim 1 characterized in that a plurality of channels ( 48 ) leading into a cylinder interior are provided in the shaft ( 32 ) carrying the cylinder ( 26 ; 17 ; 152 ; 12 ) or in the end-face cylinder journal ( 128 ), which have a line connection to end-face cha

Assignees

• Koenig & Bauer Ag

Inventors

• Kriege Björn

Classifications

• B65H2801/21

  Industrial-size printers, e.g. rotary printing press · CPC title

• B65H2406/332

  Details on suction openings · CPC title

• B65H5/226

  by suction rollers · CPC title

• B41F21/00

  Devices for conveying sheets through printing apparatus or machines (through platen presses B41F1/28) · CPC title

• B41F11/02

  for securities (security printing B41M3/14) · CPC title