Assignee
POLYGRAPH LEIPZIG
DE·139 granted patents·1,702 citations·filing 1973–1990
Top patents by PatentIndex Score
139 records- 0195US4578052AMethod and apparatus to determine folding deviationsPOLYGRAPH LEIPZIG·Filed 1982·Granted Mar 25, 1986·79 cites·14 claims
- 0291US4802769AApparatus for treating thermoplastic resinPOLYGRAPH LEIPZIG·Filed 1986·Granted Feb 7, 1989·70 cites·4 claims
- 0390US4318541ADevices for the lateral alignment of sheetsPOLYGRAPH LEIPZIG·Filed 1980·Granted Mar 9, 1982·38 cites·9 claims
- 0489US4332582ARotary folder with resettable release pointPOLYGRAPH LEIPZIG·Filed 1979·Granted Jun 1, 1982·41 cites·3 claims
- 0588US4132403ASheet transfer apparatus for printing machinePOLYGRAPH LEIPZIG·Filed 1977·Granted Jan 2, 1979·40 cites·10 claims
- 0686US4639776AIndicating device for a printing machine for superimposing ink key setting values on an image to be printedPOLYGRAPH LEIPZIG·Filed 1983·Granted Jan 27, 1987·35 cites·7 claims
- 0786US4049213AAutomatic regulation of the position of the lateral edge of a travelling webPOLYGRAPH LEIPZIG·Filed 1976·Granted Sep 20, 1977·45 cites·17 claims
- 0883US4527793AMonitoring device for monitoring book block formationPOLYGRAPH LEIPZIG·Filed 1982·Granted Jul 9, 1985·40 cites·7 claims
- 0982US4793564ADevice for controlling unwinding in a web-feeding device of a printing machinePOLYGRAPH LEIPZIG·Filed 1987·Granted Dec 27, 1988·27 cites·2 claims
- 1082US4454812ASafety device for counter rollers in a printing machinePOLYGRAPH LEIPZIG·Filed 1982·Granted Jun 19, 1984·22 cites·4 claims
- 1182US3992993ASheet transfer system for a printing machinePOLYGRAPH LEIPZIG·Filed 1975·Granted Nov 23, 1976·29 cites·4 claims
- 1281US4089518ASheet-handling apparatusPOLYGRAPH LEIPZIG·Filed 1977·Granted May 16, 1978·40 cites·11 claims
- 1380US4456379AProcess for the determination of thickness of adhesive layers of inner book block backingsPOLYGRAPH LEIPZIG·Filed 1981·Granted Jun 26, 1984·30 cites·9 claims
- 1480US4225129ASheet guidance arrangement in printing-machine outfeed unitsPOLYGRAPH LEIPZIG·Filed 1979·Granted Sep 30, 1980·25 cites·4 claims
- 1580US4099463ASupport arrangement for guiding sheets through a printing machinePOLYGRAPH LEIPZIG·Filed 1977·Granted Jul 11, 1978·22 cites·9 claims
- 1679US5060568ADistributing roller unit and printing mechanism provided therewithPOLYGRAPH LEIPZIG·Filed 1985·Granted Oct 29, 1991·21 cites·5 claims
- 1779US4357870ADriving mechanism for groups of adjustable sheet-gripping elements in a transfer cylinder of a sheet-fed printing machinePOLYGRAPH LEIPZIG·Filed 1981·Granted Nov 9, 1982·21 cites·13 claims
- 1878US4319744AJogger for the lateral alignment of sheets in sheet deliverersPOLYGRAPH LEIPZIG·Filed 1980·Granted Mar 16, 1982·24 cites·12 claims
- 1977US5024156ASafety device for the control of web-fed rotary printing machinesPOLYGRAPH LEIPZIG·Filed 1986·Granted Jun 18, 1991·24 cites·9 claims
- 2077US4815377AEngaging and disengaging device for blanket cylinders of a four-cylinder printing assembly for roller rotary offset printing machinesPOLYGRAPH LEIPZIG·Filed 1988·Granted Mar 28, 1989·22 cites·4 claims
- 2177US4640503ASheet-separating and conveying suction devicePOLYGRAPH LEIPZIG·Filed 1985·Granted Feb 3, 1987·25 cites·5 claims
- 2277US3993303AMethod and apparatus for controlled feeding of sheets to printing machines or the likePOLYGRAPH LEIPZIG·Filed 1973·Granted Nov 23, 1976·22 cites·3 claims
- 2376US4834361AVane wheel laying out device for printing productsPOLYGRAPH LEIPZIG·Filed 1988·Granted May 30, 1989·26 cites·11 claims
- 2476US4330117AMethod and device for aligning sheets to be printed in a pressPOLYGRAPH LEIPZIG·Filed 1980·Granted May 18, 1982·19 cites·9 claims
- 2573US4722489ADevice for feeding material tapesPOLYGRAPH LEIPZIG·Filed 1986·Granted Feb 2, 1988·31 cites·3 claims
- 2673US4021710ASpeed control system for a continuously operating sheet feederPOLYGRAPH LEIPZIG·Filed 1975·Granted May 3, 1977·18 cites·16 claims
- 2773US4016786AMethod of and apparatus for stamping out sheet material blanksPOLYGRAPH LEIPZIG·Filed 1974·Granted Apr 12, 1977·29 cites·7 claims
- 2871US4018161APrinting machine with sheet-transfer arrangementPOLYGRAPH LEIPZIG·Filed 1975·Granted Apr 19, 1977·16 cites·4 claims
- 2970US4651644ADevice for cleaning cylinders of printing machinesPOLYGRAPH LEIPZIG·Filed 1985·Granted Mar 24, 1987·34 cites·4 claims
- 3069US4317563ABlowing device in sheet deliverers of sheet processing machinesPOLYGRAPH LEIPZIG·Filed 1980·Granted Mar 2, 1982·21 cites·10 claims
- 3169US4108067AMethod and apparatus for continuously printing uncased folded booksPOLYGRAPH LEIPZIG·Filed 1974·Granted Aug 22, 1978·20 cites·2 claims
- 3269US4033262AInk applicator for printing apparatusPOLYGRAPH LEIPZIG·Filed 1976·Granted Jul 5, 1977·14 cites·7 claims
- 3368US4881182AMethod for controlling ink densityPOLYGRAPH LEIPZIG·Filed 1987·Granted Nov 14, 1989·17 cites·3 claims
- 3468US4372209ASheet gripping jar arrangementPOLYGRAPH LEIPZIG·Filed 1981·Granted Feb 8, 1983·15 cites·9 claims
- 3568US4343241AControl device for suction gripper systems in sheet guiding cylindersPOLYGRAPH LEIPZIG·Filed 1980·Granted Aug 10, 1982·17 cites·3 claims
- 3667US4258326ACapacitive detection of absent and/or double sheets in the sheet transport path of a printing machinePOLYGRAPH LEIPZIG·Filed 1979·Granted Mar 24, 1981·15 cites·12 claims
- 3766US4029009APrinting machine constructionPOLYGRAPH LEIPZIG·Filed 1975·Granted Jun 14, 1977·19 cites·6 claims
- 3866US3966197AMethod and apparatus for controlled feeding of sheets to printing machines or the likePOLYGRAPH LEIPZIG·Filed 1975·Granted Jun 29, 1976·15 cites·1 claims
- 3965US4566681ACollating machine with error-indicating rejection devicePOLYGRAPH LEIPZIG·Filed 1982·Granted Jan 28, 1986·16 cites·6 claims
- 4065US3946669APrinting arrangement alternatively operated for one-side printing and two-side printing with control system thereforPOLYGRAPH LEIPZIG·Filed 1973·Granted Mar 30, 1976·19 cites·15 claims
- 4164US4858539ARotational switching apparatus with separately driven stitching headPOLYGRAPH LEIPZIG·Filed 1988·Granted Aug 22, 1989·20 cites·4 claims
- 4264US4790244ASuction system for sheet guiding cylinders in printing machinesPOLYGRAPH LEIPZIG·Filed 1987·Granted Dec 13, 1988·18 cites·1 claims
- 4364US4257586AMethod and device for aligning sheets to be printed in a pressPOLYGRAPH LEIPZIG·Filed 1978·Granted Mar 24, 1981·11 cites·4 claims
- 4463US4481882ADevice for adjusting ink or moisture-application rollsPOLYGRAPH LEIPZIG·Filed 1983·Granted Nov 13, 1984·18 cites·3 claims
- 4561US4530495APick-up unit in a sheet-transporting device of a printing machinePOLYGRAPH LEIPZIG·Filed 1983·Granted Jul 23, 1985·11 cites·4 claims
- 4661US4351237ADevice for printing-pressure controlPOLYGRAPH LEIPZIG·Filed 1980·Granted Sep 28, 1982·12 cites·10 claims
- 4760US4040347AInking arrangement for printing machinePOLYGRAPH LEIPZIG·Filed 1976·Granted Aug 9, 1977·11 cites·10 claims
- 4859US4690564ADevice for measuring ink density on printed surfacesPOLYGRAPH LEIPZIG·Filed 1984·Granted Sep 1, 1987·15 cites·3 claims
- 4959US4360196ASheet-feeding arrangementPOLYGRAPH LEIPZIG·Filed 1980·Granted Nov 23, 1982·12 cites·7 claims
- 5058US4444106AArrangement for selectively connecting coaxial gear wheels of a gear train of a dual mode printing machinePOLYGRAPH LEIPZIG·Filed 1982·Granted Apr 24, 1984·11 cites·13 claims
Showing the top 50 of 139 patent records by PatentIndex Score.
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