Rotary seen printing machine with improved mounting for the screen

Claim 2

A rotary screen printing machine having a machine frame and comprising a substantially circular printing screen for each printing station thereof, means for mounting each circular printing screen to said machine frame so that, depending upon the requirements, it can be removed and again reinserted, said mounting means for said circular printing screen comprising support plate means rotatably disposed at the machine frame, an intermediate member located between said support plate means and said circular printing screen, biasing means for resiliently biasing said intermediate member, said biasing means including means for connecting said intermediate member to said support plate means, and means for connecting said intermediate member to said circular printing screen, so that said circular printing screen is secured to said support plate means via said intermediate member, said biasing means including its connecting means incorporating a number of bolt means secured to said support plate means for centering said intermediate member, said intermediate member being provided with bore means, each of which receives one of said bolt means, pressure spring means carried by each of said bolt means, each of said bore means including a base portion, each of said bolt means including a bolthead, said pressure spring means bearing against the associated bolthead and the base portion of the associated bore means.

Claim 3

A rotary screen printing machine having a machine frame and comprising a substantially circular printing screen for each printing station thereof, means for mounting each circular printing screen to said machine frame so that, depending upon the requirements, it can be removed and again reinserted, said mounting means for said circular printing screen comprising support plate means rotatably disposed at the machine frame, an intermediate member located between said support plate means and said circular printing screen, biasing means operably connected with said intermediate member for resiliently biasing said intermediate member and for tensioning said circular printing screen in the axial direction thereof, said biasing means including means for connecting said intermediate member to said support plate means, and means for detachably coupling said circular printing screen with said intermediate member, said circular printing screen being rotatably secured to said support plate means via said intermediate member without any relative rotational movement existing between said circular printing screen and said support plate means, said means for detachably coupling said circular printing screen with said intermediate member comprising a number of retaining cams arranged at the periphery of said intermediate member for retaining and centering said circular printing screen, at least one of said retaining cams being displaceably about the periphery of said intermediate member to permit radial insertion and removal of the circular printing screen.

Claim 4

A rotary screen printing machine having a machine frame and comprising a substantially circular printing screen for each printing station thereof, means for mounting each circular printing screen to said machine frame so that, depending upon the requirements, it can be removed and again reinserted, said mounting means for said circular printing screen comprising support plate means rotatably disposed at the machine frame, an intermediate member located between said support plate means and said circular printing screen, biasing means operably connected with said intermediate member for resiliently biasing said intermediate member and for tensioning said circular printing screen in the axial direction thereof, said biasing means including means for connecting said intermediate member to said support plate means, and means for detachably coupling said circular printing screen with said intermediate member, said circular printing screen being rotatably secured to said support plate means via said intermediate member without any relative rotational movement existing between said circular printing screen and said support plate means, said means for detachably coupling said circular printing screen with said intermediate member comprising a number of retaining cams arranged at the periphery of said intermediate member for retaining and centering said circular printing screen, at least one of said retaining cams being displaceably about the periphery of said intermediate member to permit radial insertion and removal of the circular printing screen.

Claim 5

A rotary screen printing machine having a machine frame and comprising a substantially circular printing screen for each printing station thereof, means for mounting each circular printing screen to said machine frame so that, depending upon the requirements, it can be removed and again reinserted, said mounting means for said circular printing screen comprising support plate means rotatably disposed at the machine frame, an intermediate member located between said support plate means and said circular printing screen, biasing means for resiliently biasing said intermediate member, said biasing means including means for connecting said intermediate member to said support plate means, and means for coupling said intermediate member to said circular printing screen, so that said circular printing screen is secured to said support plate means via said intermediate member, said coupling means further including a number of retaining cams arranged at the periphery of said intermediate member for retaining and centering said circular printing screen, at least one of said retaining cams being displaceable about the periphery of said intermediate member to permit radial insertion and removal of the circular printing screen.

Claim 6

A rotary screen printing machine having a machine frame and comprising a substantially circular printing screen for each printing station thereof, means for mounting each circular printing screen to said machine frame so that, depending upon the requirements, it can be removed and again reinserted, said mounting means for said circular printing screen comprising support plate means rotatably disposed at the machine frame, an intermediate member located between said support plate means and said circular printing screen, biasing means for resiliently biasing said intermediate member, said biasing means including means for connecting said intermediate member to said support plate means, and means for coupling said intermediate member to said circular printing screen, so that said circular printing screen is secured to said support plate means via said intermediate member, said coupling means further including a number of retaining cams arranged at the periphery of said intermediate member for retaining and centering said circular printing screen, at least one of said retaining cams being displaceable about the periphery of said intermediate member to permit radial insertion and removal of the circular printing screen.

Claim 7

A rotary screen printing machine as defined in claim 3, wherein at least three retaining cams are uniformly arranged about the periphery of said intermediate member, whereby upon displacement of the uppermost located retaining cam until it comes into contact with a neighboring retaining cam there is provided a cam-free segment extending through at least 180* about the periphery of said intermediate member, so that the circular printing screen can be approximately vertically inserted from above through said cam-free segment.

Claim 8

A rotary screen printing machine as defined in claim 3, further including groove means provided at the periphery of said intermediate member, said retaining cams being displaceably mounted in said groove means.

Claim 9

A rotary screen printing machine as defined in claim 3, wherein each of said retaining cams extends about the periphery of said intermediate member through an angle of at most 30*.

Claim 10

A rotary screen printing machine as defined in claim 3, further including groove means provided at the periphery of said intermediate member, and means for releasably locking said retaining cams at predetermined locations of said peripheral groove means.

Claim 11

A rotary screen printing machine as defined in claim 7, wherein said releasable locking means comprise spring loaded bolt means associated with said retaining cams for engaging with a notch provided at the associated retaining cam.