Printing press having a device for controlling the air in a sheet feeder

• US 5,476,041 A
• Filed: 08/10/1994
• Issued: 12/19/1995
• Est. Priority Date: 08/11/1993
• Status: Expired due to Fees

• Current Assignee: Heidelberger Druckmaschinen Ag
• Original Assignee: Heidelberger Druckmaschinen Ag
• Inventors: Czotscher, Ernst
• Primary Examiner(s): Eickholt, Eugene H.
• Application Number:
  US08/288,471
• Time in Patent Office: 496 Days
• Field of Search: 101/232, 101/248, 101/216, 271/227, 271/236, 271/250, 271/11, 271/96, 271/97, 271/98, 271/20
• US Class Current: 101/232
• CPC Class Codes: B65H 3/0891 Generating or controlling the depression B65H3/0883, B65H3/14 take precedence; in response to abnormal circumstances B65H7/16
• CPC Class Codes: B65H 3/48 Air blast acting on edges of, or under, articles

Abstract

A printing press for printing an image on sheets of printing stock can generally have a sheet feeder for separating and at least initiating start of transport of the separated sheet into the printing press. Such a sheet feeder can have a device for controlling feeder blowing air and feeder suction air, wherein the control device can have respective valves for accurately controlling the amount of blowing air and suction air. In addition, the amount of blowing air can be essentially exactly adjustable via the control console of the machine.

Claims

1. A printing press comprising:

a frame;

a plate cylinder rotatably mounted on said frame, said plate cylinder for positioning a printing plate thereon;

dampening means for applying dampening medium to said printing plate;

an ink reservoir for holding a supply of ink;

an inking mechanism for transferring the ink between said ink reservoir and said plate cylinder at least during operation of said printing press;

said inking mechanism comprising a plurality of inking rollers, at least one ink fountain roller, and at least one ink transfer roller for transferring ink between said ink fountain roller and at least one of said plurality of inking rollers;

sheet feeding means for feeding sheets of printing stock into the printing press from a stack of printing stock, the stack having a top for supplying sheets therefrom;

a rubber blanket cylinder i having a rubber blanket disposed thereabout for receiving an ink impression from the plate cylinder;

a sheet drum for receiving sheets being fed for printing the ink impression of the rubber blanket onto the sheets;

sheet delivery apparatus for receiving printed sheets and stacking the printed sheets;

said sheet feeding means comprising;

means for providing input air to an area adjacent the stack of printing stock, said means for providing input air comprising a first air passage for conducting input air to the area adjacent the stack of printing stock;

means for removal of exhaust air from an area adjacent the stack of printing stock, said means for removal of exhaust air comprising a second air passage for conducting exhaust air away from the area adjacent the stack of printing stock;

said first air passage being separate from and isolated from said second air passage;

means for controlling air flow through said means for providing input air and said means for removal of exhaust air;

said means for controlling comprising valve means;

said valve means comprising;

a first valve portion for controlling flow of air through said first air passage, said first valve portion having at least an open configuration for passage of air therethrough and a closed configuration for blocking passage of air therethrough;

a second valve portion for controlling flow of air through said second air passage, said second valve portion having at least an open configuration for passage of air therethrough and a closed configuration for blocking passage of air therethrough;

at least one solid element connecting at least a portion of said first valve portion to at least a portion of said second valve portion, said at least a portion of said first valve portion and said at least a portion of said second valve portion being connected by said at least one solid element for substantially simultaneous movement of both of said at least a portion of said first valve portion and said at least a portion of said second valve portion from at least the closed configuration to the open configuration for substantially simultaneous providing of air to the area adjacent the stack and removing of air from the area adjacent the stack, and for substantially simultaneously moving both of said at least a portion of said first valve portion and said at least a portion of said second valve portion from at least the open configuration to the closed configuration to substantially simultaneously stop providing of air to the area adjacent the stack and removing of air from the area adjacent the stack; and

single operating means for operating all of;

said at least a portion of said first valve portion, said at least a portion of said second valve portion, and said at least one solid element, substantially simultaneously.

2. The printing press according to claim 1, wherein said valve means comprises:

a valve housing, said valve housing having first and second openings for defining at least a portion of the first air passage of said means for providing input air, and third and fourth openings for defining a second air passage of said means for removal of exhaust air;

a valve body for being disposed in said valve housing, said valve body comprising a first connecting passage for connecting said first and second openings, and a second connecting passage for connecting said third and fourth openings;

said first valve portion comprises said first and second openings and said first connecting passage;

said second valve portion comprises said third and fourth openings and said second connecting passage;

said single operating means being for moving said valve body within said valve housing to;

move said first connecting passage into at least partial alignment with said first and second openings to at least partially open said first air passage, and to substantially simultaneously move said second connecting passage into at least partial alignment with said third and fourth openings to at least partially open said second air passage; and

move said first connecting passage substantially out of alignment with said first and second openings to at least substantially close said first air passage, and to substantially simultaneously move said second connecting passage substantially out of alignment with said third and fourth openings to at least substantially close said second air passage.

3. The printing press according to claim 2, wherein:

said valve housing has an;

exterior and defines a longitudinal axis;

said valve housing comprises a bore along said longitudinal axis;

said first, second, third and fourth openings being disposed through said housing from said exterior to said bore;

said valve body comprises a cylindrical body for being movably disposed within said bore;

said first and second connecting passages respectively comprise first and second bores within said cylindrical body; and

said means for operating comprises means for moving said cylindrical body within said bore to at least partially open and at least substantially close said first and second air passages.

4. The printing press according to claim 3, wherein:

said means for operating comprises first means for operating, and said first means for operating comprises one of;

means for rotating said cylindrical body within said bore; and

means for axially displacing said cylindrical body along the longitudinal axis of said bore; and

said valve means additionally comprises means for varying an amount of air flowing through said first air passage substantially independently of the amount of air flowing through said second air passage.

5. The printing press according to claim 4, wherein:

said cylindrical body defines a longitudinal axis, and said cylindrical body comprises;

a first body portion comprising said first connecting passage;

a second body portion comprising said second connecting passage, said first body portion being axially disposed with respect to said second body portion along said longitudinal axis of said cylindrical body;

said at least one solid element comprises means for rotatably connecting said first body portion to said second body portion for relative rotational movement between said first body portion and said second body portion;

said first means for operating comprises means for axially displacing said cylindrical body within said bore;

said valve means further comprises means for inhibiting rotation of said second body portion; and

said means for varying an amount of air flowing through said first air passage substantially independently of air flowing through said second air passage comprises second means for operating, said second means for operating comprises means for rotating said first body portion relative to said second body portion to move said first connecting passage relative to said first and second openings to vary an opening amount of said first air passage.

6. The printing press according to claim 5, wherein:

said valve means further comprise means for axially positioning said cylindrical body with respect to said first means for operating to partially open said first air passage with said second air passage closed;

said first and second connecting passages are each disposed substantially diametrically through said cylindrical body;

said first and second openings are disposed substantially diametrically with respect to one another on said housing;

said third and fourth openings are disposed substantially diametrically with respect to one another on said housing;

said means for rotatably connecting comprises bolt means extending from one of said first body portion and said second body portion and a threaded opening on the other of said first body portion and said second body portion to receive said bolt means therein;

said means for inhibiting rotation comprises pin means extending from one of said housing and said second body portion and slot means in the other of said housing and said second body portion for receiving said pin means therein;

said first means for operating comprises a pneumatic cylinder; and

said second means for operating comprises a motor, said motor having a rotatable shaft, and said rotatable shaft additionally comprising a transmission for transmitting rotational movement to said first body portion.

7. The printing press according to claim 6, wherein:

said pneumatic cylinder comprises a piston rod extending therefrom, said pneumatic cylinder and said piston rod defining a longitudinal axis;

said longitudinal axis of said pneumatic cylinder being disposed in alignment with said longitudinal axis of said cylindrical body;

said piston rod having a first end disposed away from said pneumatic cylinder;

said second body portion comprises a threaded member extending therefrom towards said pneumatic cylinder;

said first end of said piston rod comprises a threaded nut for engaging said threaded member of said second body portion for moving said second body portion during moving of said pneumatic cylinder;

said means for axially positioning said cylindrical body with respect to said first means for operating comprises said threaded nut and said threaded member, whereby rotation of said threaded nut axially displaces said threaded member;

said second means for operating further comprises a potentiometer driven by said rotatable shaft of said motor for measuring rotational movement/of said motor;

said rotatable shaft further comprising a handwheel for manually turning said rotatable shaft;

said transmission comprising a first gear disposed on said rotatable shaft, and a second gear disposed on said first body portion and meshing with said first gear;

said second gear being non-rotatably connected to said first body portion for movement of said first body portion with movement of said second gear; and

said means for inputting air additionally comprises an air bypass for bypassing air around said valve means when said first air passage is closed; and

said air bypass comprises an additional valve means for adjusting an amount of air bypassing said valve means.

8. The printing press according to claim 4, wherein:

said cylindrical body defines a longitudinal axis, and said cylindrical body comprises;

a one-piece integral member comprising both said first connecting passage, and said second connecting passage, said at least one solid element comprises said one-piece integral member;

said first means for operating comprises means for rotating said cylindrical body within said bore; and

said means for varying an amount of air flowing through said first air passage substantially independently of air flowing through said second air passage comprises second means for operating, said second means for operating comprises means for axially displacing said cylindrical body to move said first connecting passage relative to said first and second openings to vary an opening amount of said first air passage.

9. The printing press according to claim 8, wherein:

said first and second connecting passages are each disposed substantially diametrically through said cylindrical body and said first and second connecting passages are disposed spaced apart axially along said cylindrical body;

said first and second openings are disposed substantially diametrically with respect to one another on said housing;

said third and fourth openings are disposed substantially diametrically with respect to one another on said housing;

said first means for operating comprises a motor, said motor having a rotatable shaft, and said rotatable shaft additionally comprising a transmission for transmitting rotational movement to said first body portion; and

said second means for operating comprises a pneumatic cylinder.

10. The printing press according to claim 9, wherein:

said third and fourth openings comprise oblong slots, the oblong slots having a longitudinal dimension, and the longitudinal dimension being disposed parallel to the longitudinal axis of said housing, said oblong slots being configured for maintaining said second air passage substantially open during axial movement of said cylindrical body to adjust air flow through said first air passage;

said pneumatic cylinder comprises a piston rod extending therefrom, said pneumatic cylinder and said piston rod defining a longitudinal axis;

said longitudinal axis of said pneumatic cylinder being disposed in alignment with said longitudinal axis of said cylindrical body;

said piston rod having a first end disposed away from said pneumatic cylinder;

said first end of said piston rod comprises means for engaging said cylindrical body for moving said cylindrical body during moving of said pneumatic cylinder;

said first means for operating further comprises a potentiometer driven by said rotatable shaft of said motor for measuring rotational movement of said motor;

said printing press further comprises at least one remote control panel for operating said first and second means for operating and monitoring said potentiometer;

said rotatable shaft further comprising a handwheel for manually turning said rotatable shaft;

said transmission comprises a first gear disposed on said rotatable shaft, and a second gear disposed on said first body portion, said second gear meshing with said first gear;

said second gear being non-rotatably connected to said cylindrical body for moving said first body portion during moving of said second gear;

said means for inputting air additionally comprises an air bypass for bypassing air around said valve means when said first air passage is closed; and

said air bypass comprises an additional valve means for adjusting an amount of air bypassing said valve means.

11. In a printing press comprising:

a free, a plate cylinder rotatably mounted on said frame, said plate cylinder for positioning a printing plate thereon, dampening means for applying dampening medium to said printing plate, an ink reservoir for holding a supply of ink, an inking mechanism for transferring the ink between said ink reservoir and said plate cylinder at least during operation of said printing press, said inking mechanism comprising a plurality of inking rollers, at least one ink fountain roller, and at least one ink transfer roller for transferring ink between said ink fountain roller and at least one of said plurality of inking rollers, sheet feeding means for feeding sheets of printing stock into the printing press from a stack of printing stock, the stack having a top for supplying sheets therefrom, a rubber blanket cylinder having a rubber blanket disposed thereabout for receiving an ink impression from the plate cylinder, a sheet drum for receiving sheets being fed for printing the ink impression of the rubber blanket onto the sheets, and sheet delivery apparatus for receiving printed sheets and stacking the printed sheets;

means for controlling air flow of the sheet feeding means, the sheet feeding means having means for providing input air thereinto and means for removal of exhaust air therefrom, said means for controlling comprising;

valve means for controlling air flow through said means for providing input air and said means for removal of exhaust air;

said valve means comprising;

a first valve portion for controlling flow of air through said means for providing input air, said first valve portion having at least an open configuration for passage of air therethrough and a closed configuration for blocking passage of air therethrough;

a second valve portion for controlling flow of air through said means for removal of exhaust air, said second valve portion having at least an open configuration for passage of air therethrough and a closed configuration for passage of air therethrough;

at least one solid element connecting at least a portion of said first valve portion to at least a portion of said second valve portion for substantially simultaneously moving both of said at least a portion of said first valve portion and said at least a portion of said second valve portion between at least the open configuration and the closed configuration;

single operating means for operating all of said at least a portion of said first valve portion, said at least a portion of said second valve portion and said at least one solid element substantially simultaneously to substantially simultaneously open both said first and second valve portion and substantially simultaneously close said first and second valve portion; and

means for operating said first valve portion substantially independently of said second valve portion for varying an amount of air flowing through said first valve portion substantially independently of the amount of air flowing through said second valve portion.

12. The means for controlling according to claim 11, wherein said valve means comprises:

a valve housing having first and second openings for defining a first air passage of said means for providing input air, and third and fourth openings for defining a second air passage of said means for removal of exhaust air;

a valve body for being disposed in said valve housing, said valve body comprising a first connecting passage for connecting said first and second openings, and a second connecting passage for connecting said third and fourth openings;

said first valve portion comprises said first and second openings and said first connecting passage;

said second valve portion comprises said third and fourth openings and said second connecting passage;

said single operating means being for moving said valve body within said valve housing to;

move said first connecting passage into at least partial alignment with said first and second openings to at least partially open said first air passage, and to substantially simultaneously move said second connecting passage into at least partial alignment with said third and fourth openings to at least partially open said second air passage; and

move said first connecting passage substantially out of alignment with said first and second openings to at least substantially close said first air passage, and to substantially simultaneously move said second connecting passage substantially out of alignment with said third and fourth openings to at least substantially close said second air passage.

13. The means for controlling according to claim 12, wherein:

said valve housing has an exterior and defines a longitudinal axis;

said valve housing comprises a bore along said longitudinal axis;

said first, second, third and fourth openings being disposed through said housing from said exterior to said bore;

said valve body comprises a cylindrical body for being movably disposed within said bore;

said first and second connecting passages respectively comprise first and second bores within said cylindrical body; and

said means for operating comprises means for moving said cylindrical body within said bore to at least partially open and at least substantially close said first and second air passages.

14. The means for controlling according to claim 13, wherein:

said means for operating comprises first means for operating, and said first means for operating comprises one of;

means for rotating said cylindrical body within said bore; and

means for axially displacing said cylindrical body along the longitudinal axis of said bore.

15. The means for controlling according to claim 14, wherein:

said cylindrical body defines a longitudinal axis, and said cylindrical body comprises;

a first body portion comprising said first connecting passage;

a second body portion comprising said second connecting passage, said first body portion being axially disposed with respect to said second body portion along said longitudinal axis of said cylindrical body;

said at least one solid element comprises means for rotatably connecting said first body portion to said second body portion for relative rotational movement between said first body portion and said second body portion;

said first means for operating comprises means for axially displacing said cylindrical body within said bore;

said valve means further comprises means for inhibiting rotation of said second body portion; and

said means for operating said first valve portion substantially independently of said second valve portion for varying an amount of air flowing through said first air passage substantially independently of air flowing through said second air passage comprises second means for operating, said second means for operating comprises means for rotating said first body portion relative to said second body portion to move said first connecting passage relative to said first and second openings to vary an opening amount of said first air passage.

16. The means for controlling according to claim 15, wherein:

said valve means further comprise means for axially positioning said cylindrical body with respect to said first means for operating to partially open said first air passage with said second air passage closed;

said first and second connecting passages are each disposed substantially diametrically through said cylindrical body;

said first and second openings are disposed substantially diametrically with respect to one another on said housing;

said third and fourth openings are disposed substantially diametrically with respect to one another on said housing;

said means for rotatably connecting comprises bolt means extending from one of said first body portion and said second body portion end a threaded opening on the other of said first body portion and said second body portion to receive said bolt means therein;

said means for inhibiting rotation comprises pin means extending from one of said housing and said second body portion and slot means in the other of said housing and said second body portion for receiving said pin means therein;

said first means for, operating comprises a pneumatic cylinder; and

said second means for operating comprises a motor, said motor having a rotatable shaft, and said rotatable shaft additionally comprising a transmission for transmitting rotational movement to said first body portion.

17. The means for controlling according to claim 16, wherein:

said pneumatic cylinder comprises a piston rod extending therefrom, said pneumatic cylinder and said piston rod defining a longitudinal axis;

said longitudinal axis of said pneumatic cylinder being disposed in alignment with said longitudinal axis of said cylindrical body;

said piston rod having a first end disposed away from said pneumatic cylinder;

said second body portion comprises a threaded member extending therefrom towards said pneumatic cylinder;

said first end of said piston rod comprises a threaded nut for engaging said threaded member of said second body portion for moving said second body portion during moving of said pneumatic cylinder;

said means for axially positioning said cylindrical body with respect to said first means for operating comprises said threaded nut and said threaded member, whereby rotation of said threaded nut axially displaces said threaded member;

said second means for operating further comprises a potentiometer driven by said rotatable shaft of said motor for measuring rotational movement of said motor;

said rotatable shaft further comprising a handwheel for manually turning said rotatable shaft;

said transmission comprising a first gear disposed on said rotatable shaft, and a second gear disposed on said first body portion and meshing with said first gear;

said second gear being non-rotatably connected to said first body portion for movement of said first body portion with movement of said second gear; and

said means for inputting air additionally comprises an air bypass for bypassing air around said valve means when said first air passage is closed; and

said air bypass comprises an additional valve means for adjusting an amount of air bypassing said valve means.

18. The means for controlling according to claim 14, wherein:

said cylindrical body defines a longitudinal axis, and said cylindrical body comprises;

a one-piece integral member comprising both said first connecting passage, and said second connecting passage, said

at least one solid element comprises said one-piece integral member;

said first means for operating comprises means for rotating said cylindrical body within said bore; and

said means for operating said first valve portion substantially independently of said second valve portion for varying an amount of air flowing through said first air passage substantially independently of air flowing through said second air passage comprises second means for operating, said second means for operating comprises means for axially displacing said cylindrical body to move said first connecting passage relative to said first and second openings to vary an opening amount of said first air passage.

19. The means for controlling according to claim 18, wherein:

said first and second connecting passages are each disposed substantially diametrically through said cylindrical body and said first and second connecting passages are disposed spaced apart axially along said cylindrical body;

said first and second openings are disposed substantially diametrically with respect to one another on said housing;

said third and fourth openings are disposed substantially diametrically with respect to one another on said housing;

said first means for operating comprises a motor, said motor having a rotatable shaft, and said rotatable shaft additionally comprising a transmission for transmitting rotational movement to said first body portion; and

said second means for operating comprises a pneumatic cylinder.

20. The means for controlling according to claim 19, wherein:

said third and fourth openings comprise oblong slots, the oblong slots having a longitudinal dimension, and the longitudinal dimension being disposed parallel to the longitudinal axis of said housing, said oblong slots being configured for maintaining said second air passage substantially open during axial movement of said cylindrical body to adjust air flow through said first air passage;

said pneumatic cylinder comprises a piston rod extending therefrom, said pneumatic cylinder and said piston rod defining a longitudinal axis;

said longitudinal axis of said pneumatic cylinder being disposed in alignment with said longitudinal axis of said cylindrical body;

said piston rod having a first end disposed away from said pneumatic cylinder;

said first end of said piston rod comprises means for engaging said cylindrical body for moving said cylindrical body during moving of said pneumatic cylinder;

said first means for operating further comprises a potentiometer driven by said rotatable shaft of said motor for measuring rotational movement of said motor;

said printing press further comprises et least one remote control panel for operating said first and second means for operating and monitoring said potentiometer;

said rotatable shaft further comprising a handwheel for manually turning said rotatable shaft;

said transmission comprises a first gear disposed on said rotatable shaft, and a second gear disposed on said first body portion, said second gear meshing with said first gear;

said second gear being non-rotatably connected to said cylindrical body for moving said first body portion during moving of said second gear;

said means for inputting air additionally comprises an air bypass for bypassing air around said valve means when said first air passage is closed; and

said air bypass comprises an additional valve means for adjusting an amount of air bypassing said valve means.