Abstract: A method for controlling a slitter-scorer apparatus in which a feed line for a paperboard sheet does not need to be stopped when order specification of cutting or scoring for the paperboard sheet has been changed, thereby reducing a setup time, is proposed. The method for controlling a slitter-scorer apparatus including steps of supplying a paperboard sheet along a feed line, and moving a slitter or a scorer in a vertical and/or a widthwise direction to a operative level where the surface of said paperboard sheet is processed thereby wherein: movement of said slitter and/or scorer is controlled such that said slitter and/or scorer either come into sliding contact with or is apart slightly from said surface of the paperboard sheet.

Abstract: A printing machine in which excessive ink remaining in ink delivery tubings (20, 22, 24) each connecting an ink reservoir (16) to an ink supply source (18) can be quickly removed or rinsed out is provided.

Abstract: A flexographic ink printing machine is provided in which ink is circulated in order to prevent solidifying of the ink during a printing operation, whereby during ink supplying or ink recovering operations, high efficiency of supplying and recovering the ink can be obtained.

Abstract: A printing machine in which excessive ink remaining in ink delivery tubings connecting an ink reservoir to an ink supply source can be removed or rinsed. The printing machine includes the reservoir, supply source, and one or more ink supply and recovery tubings each connecting the reservoir to the supply source. Ink supplied from the supply source via at least one of the ink delivery tubings to the reservoir and accumulated therein is used for printing, and the printing machine also has one or more ink removing structures for removing ink remaining in the supply and recovery tubings. Each ink removing structure has respective air supply means which supply a flow rate and/or flow volume of air into the supply and recovery tubings sufficient so that air flows toward the supply source from the reservoir to remove ink remaining on the inner surface of the supply and recovery tubings.

Abstract: A cardboard sheet printing apparatus including: a rotating body that freely rotates inside an ink circulation passage through which ink flows, and a rotation-imparting assembly which is magnetically coupled with the rotating body outside the ink circulation passage and imparts rotation to the rotating body. When the rotating body is caused to rotate by the rotation-imparting assembly, the variation in the load current value that occurs upon changes in the viscosity of the ink that contacts the rotating body is detected; and this variation is compared with load current values that correspond to respective changes in the ink viscosity value stored in memory beforehand and is converted into an ink viscosity value and then displayed, so that the viscosity of the ink is adjusted based upon the calculated results.

Abstract: The present invention relates to a slitter apparatus with a compensating device for slitter blades thereof to provide a stable or proper operation for cutting a corrugated cardboard sheet. The slitter apparatus according to the present invention is comprised of a plurality of slitter heads 20-24 disposed in-line in the width direction of the corrugated cardboard sheet, each of the slitter heads including a disk-shaped slitter blade 40 for cutting the corrugated cardboard sheet being continuously fed along a feeding line by moving the disk-shaped slitter blades toward the corrugated cardboard sheet. The apparatus further comprises positioning sensors 50 for detecting the vertical position of each of the disk-shaped slitter blades 40, and an optical sensor 58 having an optical axis 60 generally disposed in a parallel relationship with respect to the corrugated cardboard sheet.

Abstract: A cardboard sheet printing apparatus including: a rotating body that freely rotates inside an ink circulation passage through which ink flows, and a rotation-imparting assembly which is magnetically coupled with the rotating body outside the ink circulation passage and imparts rotation to the rotating body. When the rotating body is caused to rotate by the rotation-imparting assembly, the variation in the load current value that occurs upon changes in the viscosity of the ink that contacts the rotating body is detected; and this variation is compared with load current values that correspond to respective changes in the ink viscosity value stored in memory beforehand and is converted into an ink viscosity value and then displayed, so that the viscosity of the ink is adjusted based upon the calculated results.

Abstract: One object of the present invention is to provide a method for cutting a corrugated card board sheet in which continuous trimmed pieces are formed over an order change period, thereby preventing meandering of the sheet without increasing manufacturing cost.

Abstract: A method for controlling a slitter-scorer apparatus in which a feed line for a paperboard sheet does not need to be stopped when order specification of cutting or scoring for the paperboard sheet has been changed, thereby reducing a setup time, is proposed.

Abstract: A printing machine in which excessive ink remaining in ink delivery tubings (20, 22, 24) each connecting an ink reservoir (16) to an ink supply source (18) can be quickly removed or rinsed out is provided.

Abstract: A cardboard sheet printing apparatus including: a rotating body that freely rotates inside an ink circulation passage through which ink flows, and a rotation-imparting assembly which is magnetically coupled with the rotating body outside the ink circulation passage and imparts rotation to the rotating body. When the rotating body is caused to rotate by the rotation-imparting assembly, the variation in the load current value that occurs upon changes in the viscosity of the ink that contacts the rotating body is detected; and this variation is compared with load current values that correspond to respective changes in the ink viscosity value stored in memory beforehand and is converted into an ink viscosity value and then displayed, so that the viscosity of the ink is adjusted based upon the calculated results.

Abstract: A method and apparatus is provided for effecting semi-closed loop positioning of a work piece, such as corrugated-board, which corrects for inherent tolerance errors in the apparatus. A controller operates a processing device, for example a slotter, a positioning device and a position measuring device. The processing device and the work piece are positioned relative each other to align the processing device with a target position on the work piece defined by a target position value. The measuring device is then used to determine the initial actual position value of the processing device relative to the work piece. A processing size is determined and tested to find whether the size is within a given tolerance. If the size is outside the tolerance, fine adjustments are made to reposition the work piece. Once the position of the processing device is within tolerance, the measuring device measures the position of the processing device to determine a corrected actual position value.

Abstract: To determine a paper splice time when the present web is spliced to a next web for the purpose of a so-called lot shift (or a paper shift) in an apparatus for producing corrugated paper boards, not only a length of each core but also a length of each web have been hitherto measured. In view of the current circumstance that a measuring operation is accompanied by various errors and an order is often given with a small lot in size, determination of a paper shift time is made at an operator's discretion which depends on his skill. In practice, there often arises a malfunction that the operator erroneously determines the time when a paper shifting operation is to be performed.

Abstract: Disclosed is a decentralized control method for a corrugator line characterized by the fact that, in the control method for a corrugator line for the continuous production of corrugated boards including the process of bonding a liner to the corrugated medium so as manufacture a single-faced corrugated board, bonding another liner to this single-faced corrugated board so as to fabricate double-faced corrugated boards or sheets, cutting the boards into predetermined lengths, and the like and having a local control unit provided for each process unit which is set up by dividing the aforenoted series of production processes so as to achieve synchronized production control of the line by means of these unit-process local control units which are allotted different functions and which are linked into a multiplex transmission network.

Abstract: In order to prevent the dispersion of knitting patterns which otherwise might result from backward motion when a circular knitting machine stops, a phase condition memory unit is provided for storing the phase condition of a sine-wave signal from a needle track detector of the circular knitting machine before the sine-wave signal passes the zero level. On condition that an output is produced from the phase condition memory unit, a synchronizing signal obtained from a synchronizing signal detector is made effective.

Abstract: A circular knitting machine having a device for electronically issuing a pattern-forming command is provided with a needle selection verification pulse detector. The needle selection verification pulse detector produces a needle selection verification pulse B.sub.1 in response to a needle-selecting coil exciting-voltage B affected by a pulse induced in a needle-selecting coil and to a needle-selecting coil command voltage A not affected by the pulse thus induced when a needle selector in a needle-selecting system moves. When the presence or absence of the command voltage A does not coincide with the presence or absence of the verification pulse B.sub.1 respectively, occurrence of a knitting error is immediately detected.