Assignee
POLYGRAPH LEIPZIG
DE139 patents
Top patents by PatentIndex Score
US4802769AFeb 7, 1989
Apparatus for treating thermoplastic resin
POLYGRAPH LEIPZIG70 citations96
US4578052AMar 25, 1986
Method and apparatus to determine folding deviations
POLYGRAPH LEIPZIG79 citations92
US4318541AMar 9, 1982
Devices for the lateral alignment of sheets
POLYGRAPH LEIPZIG38 citations92
US4793564ADec 27, 1988
Device for controlling unwinding in a web-feeding device of a printing machine
POLYGRAPH LEIPZIG27 citations91
US4640503AFeb 3, 1987
Sheet-separating and conveying suction device
POLYGRAPH LEIPZIG25 citations89
US4456379AJun 26, 1984
Process for the determination of thickness of adhesive layers of inner book block backings
POLYGRAPH LEIPZIG30 citations89
US4332582AJun 1, 1982
Rotary folder with resettable release point
POLYGRAPH LEIPZIG41 citations89
US4132403AJan 2, 1979
Sheet transfer apparatus for printing machine
POLYGRAPH LEIPZIG40 citations88
US4834361AMay 30, 1989
Vane wheel laying out device for printing products
POLYGRAPH LEIPZIG26 citations86
US4639776AJan 27, 1987
Indicating device for a printing machine for superimposing ink key setting values on an image to be printed
POLYGRAPH LEIPZIG35 citations86
US5024156AJun 18, 1991
Safety device for the control of web-fed rotary printing machines
POLYGRAPH LEIPZIG24 citations85
US4651644AMar 24, 1987
Device for cleaning cylinders of printing machines
POLYGRAPH LEIPZIG34 citations85
US4049213ASep 20, 1977
Automatic regulation of the position of the lateral edge of a travelling web
POLYGRAPH LEIPZIG45 citations84
US4527793AJul 9, 1985
Monitoring device for monitoring book block formation
POLYGRAPH LEIPZIG40 citations83
US4858539AAug 22, 1989
Rotational switching apparatus with separately driven stitching head
POLYGRAPH LEIPZIG20 citations82
US4454812AJun 19, 1984
Safety device for counter rollers in a printing machine
POLYGRAPH LEIPZIG22 citations82
US4089518AMay 16, 1978
Sheet-handling apparatus
POLYGRAPH LEIPZIG40 citations81
US5060568AOct 29, 1991
Distributing roller unit and printing mechanism provided therewith
POLYGRAPH LEIPZIG21 citations80
US4722489AFeb 2, 1988
Device for feeding material tapes
POLYGRAPH LEIPZIG31 citations80
US4357870ANov 9, 1982
Driving mechanism for groups of adjustable sheet-gripping elements in a transfer cylinder of a sheet-fed printing machine
POLYGRAPH LEIPZIG21 citations80
US4099463AJul 11, 1978
Support arrangement for guiding sheets through a printing machine
POLYGRAPH LEIPZIG22 citations80
US4319744AMar 16, 1982
Jogger for the lateral alignment of sheets in sheet deliverers
POLYGRAPH LEIPZIG24 citations79
US4815377AMar 28, 1989
Engaging and disengaging device for blanket cylinders of a four-cylinder printing assembly for roller rotary offset printing machines
POLYGRAPH LEIPZIG22 citations78
US4330117AMay 18, 1982
Method and device for aligning sheets to be printed in a press
POLYGRAPH LEIPZIG19 citations78
US4225129ASep 30, 1980
Sheet guidance arrangement in printing-machine outfeed units
POLYGRAPH LEIPZIG25 citations78
US3993303ANov 23, 1976
Method and apparatus for controlled feeding of sheets to printing machines or the like
POLYGRAPH LEIPZIG22 citations78
US4108067AAug 22, 1978
Method and apparatus for continuously printing uncased folded books
POLYGRAPH LEIPZIG20 citations76
US4317563AMar 2, 1982
Blowing device in sheet deliverers of sheet processing machines
POLYGRAPH LEIPZIG21 citations75
US4016786AApr 12, 1977
Method of and apparatus for stamping out sheet material blanks
POLYGRAPH LEIPZIG29 citations75
US3992993ANov 23, 1976
Sheet transfer system for a printing machine
POLYGRAPH LEIPZIG29 citations75
US4251121AFeb 17, 1981
Friction bearing for cylinders in a printing press
POLYGRAPH LEIPZIG6 citations74
US4530495AJul 23, 1985
Pick-up unit in a sheet-transporting device of a printing machine
POLYGRAPH LEIPZIG11 citations73
US4470347ASep 11, 1984
Combined wetting agent-distributing system for a printing machine
POLYGRAPH LEIPZIG8 citations73
US4433426AFeb 21, 1984
Control system for printing machines
POLYGRAPH LEIPZIG15 citations73
US4385560AMay 31, 1983
Remote adjustment and measuring unit for ink zoning screw of a doctor blade mechanism in an ink fountain of a printing machine
POLYGRAPH LEIPZIG7 citations73
US4111741ASep 5, 1978
Arrangement for shutting off the drive for a supply roll
POLYGRAPH LEIPZIG7 citations73
US4033262AJul 5, 1977
Ink applicator for printing apparatus
POLYGRAPH LEIPZIG14 citations73
US4018161AApr 19, 1977
Printing machine with sheet-transfer arrangement
POLYGRAPH LEIPZIG16 citations73
US5080012AJan 14, 1992
Drive for a multicolor sheet-fed rotary press
POLYGRAPH LEIPZIG8 citations72
US4351237ASep 28, 1982
Device for printing-pressure control
POLYGRAPH LEIPZIG12 citations72
US4116125ASep 26, 1978
Control system for positioning units exhibiting dead time in their response to activating signals
POLYGRAPH LEIPZIG9 citations72
US5074538ADec 24, 1991
Apparatus for separating and conveying stacked sheets
POLYGRAPH LEIPZIG10 citations71
US4762311AAug 9, 1988
Adjusting roller arrangement particularly for rotary folders
POLYGRAPH LEIPZIG9 citations71
US4690564ASep 1, 1987
Device for measuring ink density on printed surfaces
POLYGRAPH LEIPZIG15 citations71
US4444106AApr 24, 1984
Arrangement for selectively connecting coaxial gear wheels of a gear train of a dual mode printing machine
POLYGRAPH LEIPZIG11 citations71
US4406447ASep 27, 1983
Device for positioning a sheet separator
POLYGRAPH LEIPZIG8 citations71
US4343241AAug 10, 1982
Control device for suction gripper systems in sheet guiding cylinders
POLYGRAPH LEIPZIG17 citations71
US4312137AJan 26, 1982
Drying device in a sheet-fed rotary printing press
POLYGRAPH LEIPZIG11 citations71
US4109574AAug 29, 1978
Control system for positioning units exhibiting dead times
POLYGRAPH LEIPZIG8 citations71
US4021710AMay 3, 1977
Speed control system for a continuously operating sheet feeder
POLYGRAPH LEIPZIG18 citations71
Showing the top 50 of 139 patents by PatentIndex Score.