EP 0328783 B1 19920408 - METHOD OF DETERMINING A CUTTING POSITION FOR PRINTING MACHINES
Title (en)
METHOD OF DETERMINING A CUTTING POSITION FOR PRINTING MACHINES
Publication
Application
Priority
CH 62288 A 19880219
Abstract (en)
[origin: EP0328783A1] On a web offset or web letterpress printing machine, to ensure ganging of the paper webs (P1 - P4) to be folded and cut into newspapers (16), the positions of the main and subsidiary registers (5, 7) are controlled by positioning motors (Ml - M4) in dependence on positioning signals (SM1 - SM4). Over each funnel inlet guide roll (10), four photo-cells (11) are arranged beside each other with uniform spacing and detect brightness signals (HAl - HD4) at a sampling frequency of 20 kHz from the printed surface of the paper webs. These brightness signals are subjected to Fourier analysis in a microprocessor. The fundamental vibration is evaluated, the vibration of greatest amplitude being selected from the four fundamental vibrations of each paper web. The phase position signal associated with the selected fundamental vibration is used to calculate one of the positioning signals (SM1 - SM4). In this way, the cutting position of the paper webs (P1 - P4) can be determined without registration marks being applied to them. <IMAGE>
IPC 1-7
IPC 8 full level
B26D 5/30 (2006.01); B41F 13/02 (2006.01); B41F 13/54 (2006.01); B41F 33/06 (2006.01); B65H 23/18 (2006.01); B65H 23/188 (2006.01)
CPC (source: EP US)
B41F 13/025 (2013.01 - EP US); B65H 23/1886 (2013.01 - EP US); B65H 2301/4148 (2013.01 - EP US); B65H 2701/1864 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0328783 A1 19890823; EP 0328783 B1 19920408; AT E74553 T1 19920415; AU 2955489 A 19890824; AU 605959 B2 19910124; DE 3869947 D1 19920514; DK 166865 B1 19930726; DK 66589 A 19890820; DK 66589 D0 19890213; ES 2030491 T3 19921101; FI 890794 A0 19890217; FI 890794 A 19890820; FI 90326 B 19931015; FI 90326 C 19940125; JP 2609319 B2 19970514; JP H01261156 A 19891018; NO 178416 B 19951211; NO 178416 C 19960320; NO 890623 D0 19890214; NO 890623 L 19890821; US 4896605 A 19900130
DOCDB simple family (application)
EP 88121745 A 19881228; AT 88121745 T 19881228; AU 2955489 A 19890202; DE 3869947 T 19881228; DK 66589 A 19890213; ES 88121745 T 19881228; FI 890794 A 19890217; JP 3851289 A 19890220; NO 890623 A 19890214; US 30775389 A 19890208