EP1202124A2 - Vorrichtung und Verfahren für ein vergrössertes betriebliches Zeitfenster zur passgenauen Ausrichtung von Empfangsbogen - Google Patents
Vorrichtung und Verfahren für ein vergrössertes betriebliches Zeitfenster zur passgenauen Ausrichtung von Empfangsbogen Download PDFInfo
- Publication number
- EP1202124A2 EP1202124A2 EP01124333A EP01124333A EP1202124A2 EP 1202124 A2 EP1202124 A2 EP 1202124A2 EP 01124333 A EP01124333 A EP 01124333A EP 01124333 A EP01124333 A EP 01124333A EP 1202124 A2 EP1202124 A2 EP 1202124A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- receiving element
- time
- speed
- image
- moving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/002—Registering, e.g. orientating, articles; Devices therefor changing orientation of sheet by only controlling movement of the forwarding means, i.e. without the use of stop or register wall
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
- G03G15/6561—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration
- G03G15/6564—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration with correct timing of sheet feeding
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
- G03G15/6567—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for deskewing or aligning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/30—Orientation, displacement, position of the handled material
- B65H2301/33—Modifying, selecting, changing orientation
- B65H2301/331—Skewing, correcting skew, i.e. changing slightly orientation of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/50—Occurence
- B65H2511/51—Presence
- B65H2511/514—Particular portion of element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/20—Acceleration or deceleration
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00535—Stable handling of copy medium
- G03G2215/00556—Control of copy medium feeding
- G03G2215/00561—Aligning or deskewing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00535—Stable handling of copy medium
- G03G2215/00556—Control of copy medium feeding
- G03G2215/00599—Timing, synchronisation
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00535—Stable handling of copy medium
- G03G2215/00717—Detection of physical properties
- G03G2215/00721—Detection of physical properties of sheet position
Definitions
- the present invention relates to electrophotographic reproducing devices and Method for aligning sheets and in particular devices and methods for Controlling a stepper motor drive to control the movement of a receiver sheet in a position for image transmission with an image-bearing element on which a Receiving sheet to be transmitted image is arranged.
- the prior art typically uses an electrophotographic latent image Formed on the element, this image is toned and either directly onto one Transfer receiving sheet, or on an intermediate imaging element and then transferred to the receiver sheet.
- this image is toned and either directly onto one Transfer receiving sheet, or on an intermediate imaging element and then transferred to the receiver sheet.
- the sheet from stepper motor-driven rollers to the image-bearing element transported.
- the setting is made by optional Driving the stepper motor driven rollers regardless of the movement of the image-bearing element are controllable.
- the movement of the Receipt sheet and the related one carried out by various stations Machining operations controlled using one or more encoders.
- Known Alignment control systems use a transfer roller to which an encoder wheel is assigned is. This encoder is used to control sheet alignment.
- a Alignment device is described for example in US 5,731,680.
- alignment devices and methods according to the prior art have so far been limited in that they can only process and align receiver sheets that arrive at the alignment device within a small operational window. Sheets that arrive too early or too late can cause misalignment cause, or they can stop the alignment device with an appropriate Cause an error message.
- the present invention is therefore based on the object, improved methods and to provide an improved device for a precise alignment of Ensure receipt sheets within a larger operational window arrive.
- a device for transporting a Reception elements aligned with an image bearing element comprising a motor and a drive element, which in the Intervening receiving element.
- a drive coupling connects the engine to the Drive element.
- the device also includes a sensor that a leading edge of the Receiving elements recorded, as well as a timer that the time difference (the Delay) between the actual detection of the receiving element by the Sensor and the expected acquisition time determined.
- Means are provided for the To control the motor so that it blocks the movement of the receiving element Accelerates at a speed greater than the image transport speed, and for a period of time that is sufficiently long to allow for the time delay and to control the motor so that it stops the movement of the Receiving elements decelerated or decelerated to a speed equal to that Image transport speed is.
- a further device for Transporting a receiving element into an aligned relationship with one image-bearing element includes a motor and a Drive element which engages in the receiving element.
- a drive coupling connects the motor with the drive element.
- the device also includes a sensor that a front edge of the receiving element, and a timer that records the time Delay between the actual detection of the receiving element by the Sensor and the expected acquisition time determined. Means are provided for the Stop movement of the receiving element for a period of time sufficient for one Gap between the receiving element and a preceding receiving element true, based on the time at which the receiving element from the sensor was detected and the movement of the receiving element to a speed accelerate, which is essentially equal to the image transport speed.
- a method for transporting a Receiving elements in an aligned relationship with an image bearing element in provided a register system.
- the process includes the step of determining that the receiving element arrived at the register system later than expected.
- the Movement of the receiving element is then accelerated to a speed that is greater than the image transport speed for a period of time that is sufficiently dimensioned to take into account the time delay.
- the movement of the receiving element is slowed down to a speed or braked, which is equal to the image transport speed.
- a method for Transporting a receiving element into an aligned relationship with one image-bearing element provided in a register system includes the Step of determining that the receiving element on the register system is earlier than arrived as expected. The receiving element is then stopped for a period of time which is sufficient to take into account the length of time that the Receiving element arrived too early. Then the movement of the Receiving elements accelerated to a speed that is substantially equal to that Image transport speed is.
- Sheet register system 100 is in relation to a substantially flat one Sheet transport path P of any known device arranged where sheet in Row can be transported from a feeder (not shown) to a station where this Sheets are edited.
- the device can be, for example Reproduction device, such as a copier or printer, etc., where Marking particles developed images of template information on receiver sheets be applied.
- the marking particles developed images e.g. image I
- a transfer station T from an image bearing Element, such as a moving web or drum (e.g. web W) on a sheet of a receiving material (e.g. a receiving sheet S made of plain paper or transparent material) that moves along the sheet transport path P.
- the leadership the web W takes place via the transfer roller R.
- the Receiving sheet S with reference to an image developed from marking particles is aligned so that the image is arranged so that it is suitable for the user acceptable reproduction is possible.
- the sheet register system 100 therefore sees one precise alignment of the receiver sheet in a variety of orthogonal directions in front.
- the sheet with the image developed from marking particles is from the Sheet register system aligned precisely by a possible skew of the Arc (i.e. an angular deviation in relation to the picture) eliminated and the arc in Is moved so that the center line of the arc is towards the Sheet transport movement and the center line of the marking particle image together fall.
- the sheet register system 100 controls the transport of the sheet on the Sheet transport path P in time so that the sheet and the marking particle image in Longitudinally aligned when the sheet is the transfer station T passes.
- the sheet register system 100 includes first and second one from the other independently driven drive assembly 102, 104 and a third Drive assembly 106.
- the first drive assembly 102 includes a first shaft 108, which is supported at its ends in the bearings 110a, 110b, which in turn on one Frame 110 are supported.
- the mounting of the first shaft 108 is selected such that the first shaft with its longitudinal axis in a plane parallel to the plane through the Sheet transport path P and essentially perpendicular to the direction of an sheet is arranged, which passes through the sheet transport path P in the direction of arrows V (Fig. 1).
- a first drive roller 112 is on the first shaft 108 for rotation with the shaft arranged.
- the drive roller 112 includes a curved peripheral segment 112a that extends extends 180 ° around the roller.
- the peripheral segment 112a has a radius thereof Surface that, measured from the longitudinal axis to the first shaft 108, essentially is equal to the minimum distance of this longitudinal axis from the plane of the sheet transport path P.
- One or more motors can be operated to drive the drive elements via a drive clutch.
- a first stepper motor M 1 which is mounted on the frame 110, is operatively coupled to the first shaft 108 via a gear train 114 to rotate the first shaft when the motor is activated.
- the wheel 114a of the gear train 114 comprises a marking 116, which can be detected by a suitable sensor mechanism 118.
- the sensor mechanism 118 can be either optical or mechanical, depending on the selected marking 116.
- the position of the sensor mechanism 118 is selected such that when the marking 116 is detected, the first shaft 108 is oriented at an angle such that it positions the first drive roller 112 in a starting position positioned.
- the starting position of the first drive roller is the angular orientation in which the surface of the curved peripheral segment 112a of the drive roller 112 contacts an arc in the sheet transport path P as the first shaft 108 rotates further (see FIG. 7a).
- the second drive assembly 104 includes a second shaft 120, which at its ends in the bearings 110c, 110d, which in turn are supported on the frame 110.
- the Bearing of the second shaft 120 is selected such that the second shaft with its Longitudinal axis in a plane parallel to the plane through the sheet transport path P and in Is arranged substantially perpendicular to the direction of an arc that the Through the sheet transport path.
- the longitudinal axis of the second shaft 120 is in the Arranged essentially coaxially to the longitudinal axis of the first shaft 108.
- a second drive roller 122 is arranged on the second shaft 120 for rotation with the shaft.
- the drive roller 122 includes a curved peripheral segment 122a that extends 180 ° around the roller.
- the peripheral segment 122a has a radius to its surface which, measured from the longitudinal axis to the first shaft 108, is substantially equal to the minimum distance of this longitudinal axis from the plane of the sheet transport path P.
- the curved peripheral segment 122a coincides with the curved peripheral segment 112a of the drive roller 112.
- a second, independent stepper motor M 2 which is mounted on the frame 110, is operatively coupled to the second shaft 120 via a gear train 124 to rotate the second shaft when the motor is activated.
- the wheel 124a of the gear train 124 comprises a marking 126, which can be detected by a suitable sensor mechanism 128.
- the sensor mechanism 128, which can be adjustably attached to the frame 110, can be either optical or mechanical, depending on the selected marking 126.
- the position of the sensor mechanism 128 is selected such that when the marking 126 is detected, the second shaft 120 is oriented at an angle such that it second drive roller 122 positioned in a starting position.
- the starting position of the second drive roller is the angular orientation in which the surface of the curved peripheral segment 122a of the drive roller 122 contacts an arc in the sheet transport path P as the first shaft 120 rotates further (as does the angular orientation of the peripheral segment 112a shown in FIG. 7a).
- the third drive assembly 106 includes a tube 130 which surrounds the first shaft 108 and is displaceable in the direction of its longitudinal axis relative to the first shaft.
- Two third drive rollers 132 are mounted on the first shaft 108 and hold the tube 130 for relative rotation with respect to the third drive rollers.
- the third drive rollers 132 each include a curved peripheral segment 132a that extends 180 ° around each roller.
- the peripheral segment 132a has a radius to its surface which, measured from the longitudinal axis to the first shaft 108, is substantially equal to the minimum distance of this longitudinal axis from the plane of the sheet transport path P.
- the curved peripheral segments 132a are angularly offset with respect to the curved peripheral segments 112a, 122a of the first and second drive rollers.
- the two third drive rollers 132 are coupled to the first shaft 108 via a spring or a pin 134 which engages in a groove 136 of the corresponding roller (FIG. 4). Accordingly, the third drive rollers 132 are rotatably driven with the first shaft 108 when the first shaft is rotated by the first stepping motor M 1 , and are slidable in the direction along the longitudinal axis of the first shaft with the pipe 130. For a purpose that will be explained in more detail below, the third drive rollers 132 are angularly aligned such that the curved peripheral segments 132a are offset with respect to the curved peripheral segments 112a and 122a.
- a third independent stepper motor M 3 which is attached to the frame 110, is operatively coupled to the tube 130 of the third drive assembly 106 to selectively move the third drive assembly in either direction along the longitudinal axis of the first shaft 108 when the motor is activated.
- the coupling between the third stepper motor M 3 and the tube 130 takes place by means of a pulley / belt group 138.
- the pulley / belt group 138 comprises two pulleys 138a, 138b which are rotatably arranged in a fixed spatial relationship, for example on a part of the frame 110.
- a drive belt 138c running around the pulleys is connected to a bracket 140, which in turn is connected to the tube 130.
- a drive shaft 142 of the third stepper motor M 3 is in driving engagement with a wheel 144 which is coaxially coupled to the pulley 138a.
- the wheel 144 rotates and this in turn rotates the pulley 138a, so that the drive belt 138c rotates its closed path.
- the holder 140 (and thus the third drive assembly 106) is optionally moved in one of the two directions along the longitudinal axis of the first shaft 108.
- a plate 146 connected to the frame 110 includes a mark 148 that passes through a suitable sensor mechanism 150 can be detected.
- the adjustable on the Frame 140 attached sensor mechanism 150 can be either optical or mechanical depending on the selected marker.
- the location of the sensor mechanism 150 is selected such that when the marking 148 is detected, the third drive assembly 106 in a starting position is positioned.
- the starting position of the third Drive assembly 106 is selected such that the third drive assembly in the Essentially centered in relation to the transverse direction of a sheet in the sheet transport path P. is arranged.
- the frame 110 of the sheet register system 100 also holds a shaft 152 that is general is arranged below the plane of the sheet transport path P.
- the two Idler rollers 154 and 156 are freely rotatable on shaft 152.
- the two Idler rollers 154 are on the first drive roller 112 and the second, respectively Drive roller 122 aligned.
- the two idler rollers 156 are on the respective third drive rollers 132 aligned and extend in the longitudinal direction by one Distance that is large enough to align this over the range of Maintain longitudinal movement of the third drive assembly 106.
- the distance of the shaft 152 to the plane of the sheet transport path P and the diameter of the respective two Idler rollers 154 and 156 are selected such that the rollers each close a gap form the curved peripheral segments 112a, 122a and 132a of the drive rollers.
- shaft 152 may be spring loaded in one direction so that the shaft presses against the shafts 108, 120, the two idler rollers 154 in the Engage spacer roller bearings 112b, 122b.
- sheets which pass through the sheet transport path P one after the other can be precisely aligned by eliminating any skew (angular deviation) of the sheet in order to register the sheet at right angles with respect to the transport path, and around the sheet To move the sheet in the transverse direction so that the center line of the sheet in the sheet transport direction and the center line C L of the sheet transport path P coincide.
- the center line C L is of course arranged in such a way that it coincides with the center line of the subsequent processing station (in the exemplary embodiment shown this is the center line of a marking particle image on the web W.)
- the sheet register system 100 controls the transport of the sheet along the sheet transport path P for precise alignment in the transport longitudinal direction (in relation to the exemplary embodiment shown, that is, in alignment with the front edge of the marking particle image on the web W).
- the mechanical elements of the sheet register system 100 are operatively related to a controller.
- Corresponding controls and control systems are described in US 5,731,680.
- the controller receives input signals from a variety of sensors associated with the sheet register system 100 and a downstream processing station. Using these signals and an operating system, the control generates corresponding signals for controlling the independent stepper motors M 1 , M 2 and M 3 of the sheet register system.
- FIGS. 5, 6 and 7a-7f To explain the operation of the sheet register system 100, reference is now made in particular to FIGS. 5, 6 and 7a-7f, in which a receiving sheet S located in the sheet transport path P is conveyed by an upstream transport assembly, the inseparable transport roller (not shown) is transported in the vicinity of the sheet register system.
- This arc can be oriented at an angle (for example angle ⁇ in FIG. 5) to the center line C L of the arc transport path P and can have a center A which is spaced apart from the center line of the arc transport path (for example distance d in FIG. 5) ,
- the undesired angle ⁇ and the undesired distance d generally arise from the type of the upstream transport assembly and differ from sheet to sheet.
- the gap sensors 160a, 160b are arranged above the plane X 1 (see FIG. 5).
- the plane X 1 includes the longitudinal axes of the drive rollers (112, 122, 132) and the idler rollers (154, 156).
- the gap sensors 160a, 160b can be optical or mechanical, for example.
- the gap sensor 160a is arranged on one side (in the transverse direction) of the center line C L , while the gap sensor 160b is arranged at an essentially equal distance on the opposite side of the center line C L.
- the gap sensor 160a detects the leading edge of a sheet being transported on the sheet transport path P, it generates a signal that is sent to the controller to activate the first stepping motor M 1 .
- the gap sensor 160b detects the leading edge of a sheet being transported on the sheet transport path P, it also generates a signal that is sent to the controller to activate the second stepping motor M 2 . If the receiving sheet S is subjected to a skew in relation to the sheet transport path P, the front edge of one side of the center line C L is recognized in front of the front edge of the opposite side of the center line (without skewing the front edges of the opposite sides of the center line are of course recognized at the same time).
- the first stepper motor M 1 when activated, ramps up to a speed such that the first drive roller 112 is rotated at an angular speed that produces a predetermined peripheral speed for the curved peripheral segment 112a that is substantially equal to the entry speed of a is transported on the sheet transport path P.
- a section of the sheet S enters the gap between the curved peripheral segment 112a of the first drive roller 112 and the associated roller of the two idler rollers 154, this section of sheet is transported on the sheet transport path P essentially without interruption (see FIG. 7b).
- the second stepper motor M 2 When the second stepper motor M 2 is activated by the control unit, it also runs up to a speed such that the second drive roller 122 is rotated at an angular speed (which is substantially equal to the angular speed of the first drive roller), which is a predetermined peripheral speed for the curved circumferential segment 122a of the roller is generated, which is substantially equal to the entry speed of a sheet transported on the sheet transport path P.
- an angular speed which is substantially equal to the angular speed of the first drive roller
- a predetermined peripheral speed for the curved circumferential segment 122a of the roller is generated, which is substantially equal to the entry speed of a sheet transported on the sheet transport path P.
- the portion of the sheet S enters the gap between the curved peripheral segment 122a of the second drive roller 122 and the associated roller of the two idler rollers 154, this portion of the sheet is transported on the sheet transport path P substantially without interruption.
- the sensor 160b detects the front edge of the sheet based on the
- Two track length sensors 162a, 162b are arranged below the plane X 1 . These longitudinal track sensors 162a, 162b are therefore arranged below the gaps formed by the respective curved peripheral segments 112a, 122a and the associated rollers of the two idler rollers 154. The receiving sheet S is therefore under the control of this column.
- the longitudinal track sensors 162a, 162b can, for example, be of an optical or mechanical type.
- the track length sensor 162a is arranged on one side (in the transverse direction) of the center line C L , while the track length sensor 162b is arranged at an essentially equal distance on the opposite side of the center line C L.
- the sensor 162a detects the leading edge of a sheet that is transported on the sheet transport path P by the drive roller 112, it generates a signal that is sent to the controller to deactivate the first stepping motor M 1 . Also, when the gap sensor 162b detects the leading edge of a sheet being transported by the drive roller 122 on the sheet transport path P, it generates a signal that is sent to the controller to deactivate the second stepping motor M 2 .
- the receiving sheet S is skewed with respect to the sheet transport path P, the leading edge of one side of the center line C L is recognized before the leading edge of the opposite side of the center line.
- the speed decreases to a stop so that the first drive roller 112 has a zero angular velocity around the engaged portion of the sheet in the gap between the curved peripheral segment 112a to stop the first drive roller 112 and the associated roller of the two idler rollers 154 (see FIG. 7c).
- the speed decreases to a stop so that the first drive roller 112 has a zero angular velocity around the engaged portion of the sheet in the gap between the curved peripheral segment 122a of the second Stop drive roller 122 and the associated roller of the two idler rollers 154.
- FIG. 7c the speed decreases to a stop so that the first drive roller 112 has a zero angular velocity around the engaged portion of the sheet in the gap between the curved peripheral segment 122a of the second Stop drive roller 122 and the associated roller of the two idler rollers 154.
- the sensor 162b detects the leading edge of the sheet based on the angle ⁇ of the sheet S before the sensor 162a detects the leading edge.
- the stepping motor M 2 is therefore deactivated before the stepping motor M 1 is deactivated.
- the portion of the sheet in the gap between the curved peripheral segment 122a of the second drive roller 122 and the associated roller of the two idler rollers 154 is substantially retained (ie is not moved in the direction of the sheet transport path P), while the portion of the sheet in the gap between the curved peripheral segment 112a of the first drive roller 112 and the associated roller of the two idler rollers 154 is moved further in the forward direction.
- the receiving sheet S essentially rotates around its center A until the stepping motor M 1 is deactivated. This rotation aligns the sheet at a right angle through an angle ⁇ (essentially complementary to the angle ⁇ ) and eliminates the skewing in relation to the sheet transport path P in order to align its leading edge with a precise fit.
- a sensor 164 such as a set of sensors (either optical or mechanical, as shown in With respect to other sensors of the sheet register system 100) described in Transverse direction is precisely aligned (see Fig. 5), detects a side edge of the Arc S and generates a signal indicating the position of this side edge.
- the signal from sensor 164 is transferred to the controller, where the operating program determines the distance (eg distance d in FIG. 5) from the center A of the sheet to the center line C L of the sheet transport path P.
- the first stepping motor M 1 and the second stepping motor M 2 are activated at a suitable point in time determined by the operating program.
- the first drive roller 112 and the second drive roller 122 then start to start transporting the sheet in the downstream direction (see FIG. 7d).
- the stepper motors ramp up to such a speed that the drive rollers of the drive assemblies 102, 104 and 106 are rotated at an angular speed that produces a predetermined peripheral speed for the respective portions of the curved peripheral segments.
- This predetermined peripheral speed is, for example, substantially equal to the speed of the web W. Although other predetermined peripheral speeds are also suitable, it is important that this speed is substantially equal to the speed of the web W when the receiver sheet S touches the web.
- the rotation of the third drive rollers 132 also begins when the first stepping motor M 1 is activated.
- the curved peripheral segments 132a of the third drive rollers 132 are not in contact with the receiving sheet S and do not act on it.
- the curved peripheral segments 132a engage the sheet (in the gap between the curved peripheral segments 132a and the associated rollers of the two idler rollers 156) and after a certain angular rotation, the curved peripheral segments 112a and 122a of the first and second drive rollers release the sheet ( see Fig. 7e).
- Control over the sheet is thus transferred from the gaps formed by the curved peripheral segments of the first and second drive rollers and the two idler rollers 154 to the bent peripheral segments of the third drive rollers and the two idler rollers 156 such that the sheet is only under the control of the third drive rollers 132 is transported on the sheet transport path P.
- the control activates the third stepping motor M 3 .
- the first stepping motor M 3 drives the third drive assembly 106 through the previously described pulleys / belt group 138 in a corresponding direction and over a corresponding distance in the transverse direction.
- the arc in the gaps between the curved peripheral segments of the third drive rollers 132 and the associated rollers of the two idler rollers 156 is thereby transported in a transverse direction to a place where the center A of the arc coincides with the center line C L of the arc transport path P by which to create the desired precise transverse alignment of the sheet.
- the third drive rollers 132 transport the sheet further along the Sheet transport path P at a speed substantially equal to that Speed of the web W is until the leading edge comes to rest on the web, namely in a precise alignment with the image I. arranged on the track At this time, the angular rotation of the third drive rollers 132 releases the bent ones Circumferential segments 132a of these rollers from the receiver sheet S (see Fig. 7f). Since the curved peripheral segments 112a and 122a of the first and second, respectively Drive roller 112, 122 also have no contact with the sheet, the sheet can run along with the web W without the action of any forces that would otherwise be caused by the Drive rollers would have acted on the sheet.
- the stepper motors M 1 , M 2 and M 3 are turned on for a time dependent on signals from the respective sensors 118, 128 and 150 sent to the controller, activated and then deactivated. As previously described, these sensors are home position sensors. When the stepper motors are deactivated, the first, second and third drive rollers are therefore in their respective starting positions.
- the drive assemblies 102, 104, 106 of the sheet register system 100 according to the invention are therefore in the position shown in FIG. 7a, and the sheet register system is ready to carry out a skew correction and a precise alignment in the transverse and longitudinal directions for the next sheet transported on the sheet transport path P. ,
- register systems are according to the state of the art limited that they can only process receiver sheets that are on the Sheet register system 100 arrive within a small operational window of time.
- the present invention provides speed profiles for processing sheets that arrive outside of the normal operational window.
- Fig. 8 shows a time curve of a normal speed profile.
- the time curve shows the peripheral speed of the first and second curved Circumferential segments 112a, 122a of the first and second drive rollers 112, 122 while they intervene in the receiving sheet S and move it through the alignment process.
- the process begins at time A when the sheet register system receives a reference signal (F-PERF) which indicates that the image I is at a predetermined reference location in relation to the sheet support point.
- F-PERF reference signal
- the leading edge of the Arc S detected by the gap sensors 160a, 160b. Accelerate at time C.
- Drive rollers 112, 122 such that the peripheral segments 112a, 122a in the Entry speed 210 intervene in the receiving sheet S.
- the Entry speed 210 is a relatively high speed at which the Receiving sheet S is moved to the track length sensors.
- the Entry speed is approximately 32.5 inches / s.
- the leading edge of the arc S detected by the longitudinal sensors.
- the Delay in sheet speed initiated.
- To skew the arch S. correct the speed of the two drive rollers 112, 122 independently decelerate from each other as previously described.
- the receiving sheet is S precisely aligned and the skew corrected.
- the web speed is 220 the speed at which the receiving sheet S of the moving web W is fed.
- the path speed is approximately equal to the speed at which the web W moves.
- the entry speed can be approximately 17.68 inches / s (44.91 cm / s).
- the speed profile described above provides a precise alignment of Reception sheets that arrive within a small operational window. However, this speed profile does not take into account the receiving sheet that is too late arrive. If an acceptance sheet is later than within the standard operational time window provided, the arch has no time to get out of high Decelerate speed, linger and at the right time Accelerate web speed. State-of-the-art register systems usually stop a bow if it arrives late.
- the exemplary embodiment of the invention is a first, modified speed profile provided to properly align sheets that are later than in the standard operational time window provided. This first modified Speed profile is discussed with reference to the time curve of Figure 9a.
- a receiving sheet S arrives at the sheet register system 100 too late, it is detected at the gap sensors at a later time than expected.
- the receiving sheet can be detected by the gap sensors 160a, 160b at the point in time B 1 , which is after the point in time B (FIG. 8) at which the receiving sheet would normally be recorded.
- the receiving sheet S lags behind the image reference signal received at time A.
- the image reference signal is generated in response to the movement of the web W, which is independent of the alignment process.
- the receiving sheet S must therefore take up enough time, taking into account the delayed arrival, to hit the web W at the right time K.
- the drive rollers accelerate as usual to intervene in the receiving sheet S at entry speed 210.
- time D 1 when the length sensors 162a, 162b detect the front edge of the receiving sheet S, a braking process is initiated. If the receiving sheet S comes to a halt at the time E 1 , any skewing of the receiving sheet is corrected. In contrast to the normal speed profile, however, the receiving sheet S only remains for a short time after the time E 1 . For example, the receiving sheet S may linger for approximately one millisecond before acceleration begins at time F 1 . The shorter dwell time after time E 1 and before the acceleration time F 1 compensates for a certain loss of time which the reception sheet S has suffered due to its late arrival.
- the receiving sheet S is accelerated to a speed 230 at the time F 1 , which is higher than the web speed 220.
- the entry speed 230 may be approximately 22.1 inches / s (56.13 cm / s).
- the receiver sheet maintains this speed 230 for a period of time, which is sufficient to compensate for the delayed arrival.
- the receiver sheet can maintain speed 230 until time G 1 , after which the receiver sheet is braked again to web speed 220.
- the time period between time F 1 and time G 1 is variable in order to take into account different delays in the incoming receiver sheet. To take into account a relatively small time delay, G 1 can be close to F 1 .
- G 1 can be chosen as late as possible.
- the time G 1 must be so early that the receiving sheet S can slow down to web speed 220 before the receiving sheet hits the moving web W at time K.
- Register system 100 is able to receive the receiving sheet S arriving late process so that the sheet gains enough time to K to hit the moving web W.
- further speed profiles for processing are delayed incoming reception sheet provided.
- a second one is modified Speed profile discussed with reference to Figure 9b.
- the receiving sheet S is detected by the gap sensors 160a, 160b at time B 2 , a time which is also later than expected.
- the drive rollers 112, 122 accelerate as usual to engage the receiving sheet S with the curved peripheral segments 112a, 122a at the entry speed 210.
- the receiving sheet S is then transported at entry speed 210 until time D 2 , at which a delay is initiated.
- the receiving sheet S is not brought to a stop, as in the speed profiles described so far. Instead, the receiving sheet S is decelerated directly to web speed 220 to make up for lost time.
- the sheet reaches web speed 220 at time E 2 .
- the second, modified speed profile is variable to account for different delays in the arrival time.
- the time D 2 can be set such that the receiving sheet S catches up with the respective delay time in order to be able to hit the moving web W at the correct time K.
- This variability is subject to the only condition that the skew must be corrected before the transverse registration begins at time H, and that the receiver sheet must have reached web speed 220 before time K when the sheet hits moving web W.
- a third, modified speed profile is also provided. This third modified speed profile is discussed below with reference to Figure 9c.
- the receiving sheet S is detected by the gap sensors 160a, 160b later than expected.
- the drive rollers 112, 122 accelerate in order to intervene in the receiving sheet S at the entry speed 210.
- a braking process is initiated.
- the receiving sheet S is not stopped. Instead, the receiver sheet is decelerated to a variable speed 240. The receiving sheet S maintains the variable speed 240 until time G 3 when it is accelerated to path speed 220.
- speed 240 is variable in order to take into account different delay times of the receiver sheet.
- a lower speed 240 can be selected, for example; in order to take relatively long delays into account, a higher speed 240 can be selected.
- a higher speed 240 can be selected if a speed 240 is selected that is higher than the web speed 220, the receiver sheet is not accelerated to web speed 220 at time G 3 , but is decelerated. As in the previous speed profiles, the transverse alignment takes place between the time H and the time J. The receiving sheet S then strikes the moving web W at the right time K.
- the second and third, modified speed profiles are similar in that the receiver sheet S is not stopped during the alignment process. At one point, these two speed profiles even overlap.
- the speed 240 of the third, modified speed profile (FIG. 9c) can be selected such that it corresponds to the entry speed 210. At time D 3 there is therefore no delay in the third modified speed profile. Instead, there is a delay from entry speed 210 to path speed 220 at time G 3 .
- the time D 2 of the second modified speed profile (FIG. 9b) can be selected such that it coincides with the time G 3 of the third modified speed profile and that the corresponding delay from entry speed 210 to web speed 220 takes place at this time.
- the second and third, modified speed profiles keep the receiving sheet S at entry speed 210 until it is decelerated directly to path speed at a point in time G 3 from FIG. 9c.
- the first modified speed profile is the preferred.
- the first modified speed profile allows for easy Skew correction by making the receiver sheet S stop after the front edge of which has been detected by the longitudinal track sensors 162a, 162b.
- the present invention also provides methods for aligning receiver sheets on the sheet register system 100 earlier than within normal operational Arrive time window. If an receiving sheet S is too early on the When the sheet register system 100 arrives, its leading edge could match the preceding sheet overlap. In this case, the track length sensors 162a, 162b detect the leading edge of the Receiving sheet S, whereupon an alignment error occurs.
- a speed profile for Processing of receiving sheets provided that arrive too early As an example, a fourth modified speed profile discussed with reference to FIG. 10.
- a receiving sheet S arrives at the sheet register system 100 too early, it is detected at the gap sensors at an earlier point in time than expected.
- the receiving sheet can be recorded at time B 4 , which is before time B (FIG. 8), at which the receiving sheet would normally be recorded.
- the receiving sheet S is too early in relation to the image reference signal received at time A. If processing continued as usual, the premature receiving sheet S could overtake and possibly overlay the previous sheet, causing an alignment error.
- the receiving sheet S must therefore be delayed for a period of time, or it must be aligned in another way in order to avoid alignment errors and to ensure that the receiving sheet S hits the web W at the right time K.
- the sheet register system 100 tries to align the sheet normally.
- the drive rollers 112, 122 accelerate as usual in order to engage the receiving sheet S with the curved peripheral segments 112a, 122a at the entry speed 210.
- the sheet register system 100 then waits an appropriate time to determine whether the track length detection is taking place.
- time D 4 which is later than time C 4 , compared to time D and time C in FIG. 8, the sheet register system determines that the normal track length detection has not taken place.
- the receiving sheet S is therefore stopped at time D 4 . Alignment and skew correction are carried out by using the detection by the gap sensors as a reference, not the track length detection.
- the gap sensors 160a, 160b are typically able to detect the front edge of the receiving sheet S even if it arrives too early, because at the time of the gap sensor detection the receiving sheet S arriving too early has generally not yet caught up with the preceding sheet.
- the alignment based on the gap sensor detection is somewhat less precise due to the limited accuracy of the gap sensors; this alignment method is therefore usually not preferred. However, the deviation in accuracy is relatively small and therefore tolerable for the occasional alignment of early reception sheets.
- the receiving sheet S is accelerated to web speed 220.
- the receiving sheet in the sheet register system 100 traveled a further distance at time D 4 than a receiving sheet would normally have traveled at time D (FIG. 8). This is due to the fact that the receiving sheet arriving too early was kept at entry speed 210 for a somewhat longer time up to time D 4 in order to ensure that no track length detection occurred.
- the acceleration of the arc to web speed 220 takes place at time F 4 in absolute terms later than at time F (FIG. 8).
- the receiving sheet S therefore spends a relatively shorter period of time at web speed 220; the difference in position is corrected, and the receiving sheet S strikes the moving web W at the correct point in time K. In the meantime, as usual, a transverse alignment is carried out between time H and time J.
- a fifth, modified speed profile is provided for processing receiving sheets arriving at sheet register system 100 too early, as shown in FIG. 10b.
- the receiving sheet S is detected by the gap sensors 160a, 160b at time B 5 , a time which is also earlier than expected.
- the drive rollers accelerate as usual to intervene in the receiving sheet S at entry speed 210.
- a delay is initiated at time D 5a .
- the receiving sheet S is not completely stopped, as in the previous speed profile (Fig. 10a). Instead, the receiver sheet is decelerated to speed 250, which is selected to be sufficiently low to prevent receiver sheet S from catching up with the preceding sheet.
- Time C 5 and speed 250 can be variable to take into account the different time periods when an receiving sheet can arrive earlier than expected.
- the receiving sheet S is detected by the longitudinal track sensors at time D 5b , a second delay is initiated, which this time ends in a complete stop at time E 5 .
- the detection of the receiver sheet at the longitudinal track sensors 162a, 162b can serve as a reference for the alignment process, which leads to a higher alignment accuracy compared to the gap sensor detection.
- the receiving sheet S is accelerated to web speed 220. As in all other speed profiles, the transverse alignment takes place between the time H and the time J. The receiver sheet then hits the moving web W at the right time K.
- first and second drive rollers 112, 122 operate independently of one another, it is possible that completely different for the respective rollers Speed profiles are used. If an reception sheet S am Arch register system 100 arrives with very strong skew, it is possible that a Side of the sheet S arrives earlier than usual and the other side arrives later than usual.
- the gap sensors 160a could be the leading edge of one end of the sheet S detect earlier than expected, and gap sensors 160b could detect the leading edge of the capture the other end of the arc S later than expected.
- the present invention provides before using the appropriate speed profiles to the first and second To drive the drive roller 112, 122 such that skew is corrected. In particular would be the first, second or third modified speed profile (Fig.
Abstract
Description
- Fig. 1
- eine Seitenansicht eines Bogenregistersystems, teilweise in Schnittdarstellung, wobei Teile zur besseren Übersicht entfernt sind;
- Fig. 2
- eine perspektivische Ansicht des Bogenregistersystems aus Fig. 1, wobei Teile zur besseren Übersicht entfernt oder nicht vollständig dargestellt sind;
- Fig. 3
- eine Draufsicht auf das Bogenregistersystem aus Fig. 1, wobei Teile zur besseren Übersicht entfernt oder nicht vollständig dargestellt sind;
- Fig. 4
- eine Frontalansicht in Schnittdarstellung der dritten Walzenanordnung des Bogenregistersystems aus Fig. 1;
- Fig. 5
- eine schematische Darstellung des Bogentransportwegs zur Darstellung der Maßnahmen, mit denen ein einzelner Bogen bei seinem Transport entlang eines Transportwegs von dem Bogenregistersystem aus Fig. 1 beaufschlagt wird;
- Fig. 6
- eine grafische Darstellung des Profils der Umfangsgeschwindigkeit im zeitlichen Verlauf für die Antriebswalzen des Bogenregistersystems aus Fig. 1;
- Fig. 7a-7f
- entsprechende Seitenansichten der Antriebswalzen des Bogenregistersystems aus Fig. 1 zu verschiedenen Zeitintervallen im Betrieb des Bogenregistersystems;
- Fig. 8
- ein Zeitablaufdiagramm eines normalen Registergeschwindigkeitsprofils entsprechend bekannter Registersysteme;
- Fig. 9a-9c
- Zeitablaufdiagramme von Registergeschwindigkeitsprofilen zur Verarbeitung zu spät eintreffender Empfangsbogen nach diversen bevorzugten Ausführungsbeispielen der Erfindung; und
- Fig. 10a-10b
- Zeitablaufdiagramme von Registergeschwindigkeitsprofilen zur Verarbeitung zu früh eintreffender Empfangsbogen nach diversen bevorzugten Ausführungsbeispielen der Erfindung.
- I
- Bild
- K
- richtiger Zeitpunkt
- M1
- erster Schrittmotor
- M2
- zweiter Schrittmotor
- M3
- dritter Schrittmotor
- P
- Bogentransportweg
- S
- Empfangsbogen
- T
- Übertragungsstation
- W
- Bahn
- 100
- Bogenregistersystem
- 102
- erste Antriebsbaugruppe
- 104
- zweite Antriebsbaugruppe
- 106
- dritte Antriebsbaugruppe
- 108
- erste Welle
- 110
- Rahmen
- 110c
- Lager
- 110d
- Lager
- 112
- erste Antriebswalze
- 112a
- Umfangssegment
- 114
- Getriebezug
- 118
- Sensormechanismus
- 120
- zweite Welle
- 122
- zweite Antriebswalze
- 122a
- Umfangssegment
- 124a
- Rad
- 124
- Getriebezug
- 126
- Erkennungszeichen
- 128
- Sensormechanismus
- 130
- Rohr
- 132
- dritte Antriebswalze
- 132a
- Umfangssegment
- 134
- Stift
- 136
- Nut
- 138
- Riemenscheiben/Riemengruppe
- 138a
- Riemenscheibe
- 138b
- Riemenscheibe
- 140
- Halterung
- 142
- dritte Antriebswelle
- 144
- Rad
- 146
- Platte
- 148
- Erkennungszeichen
- 150
- Sensormechanismus
- 152
- Welle
- 154
- Mitläuferwalzen
- 160a
- Spaltsensor
- 160b
- Spaltsensor
- 162a
- Spurlängssensor
- 162b
- Spurlängssensor
- 210
- Eintrittsgeschwindigkeit
- 220
- Bahngeschwindigkeit
- 230
- erhöhte Geschwindigkeit
- 240
- variable verringerte Geschwindigkeit
- 250
- variable verringerte Geschwindigkeit
Claims (15)
- Vorrichtung zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei die Vorrichtung folgendes umfasst:einen Motor (M1);ein Antriebselement (112), das in Eingriff mit dem Empfangselement (S) bringbar ist;eine Antriebskupplung (108, 114), die den Motor (M1) und das Antriebselement (112) miteinander verbindet;einen Sensor (160a,b), der die Vorderkante des Empfangselements erfasst;einen Zeitgeber, der die Zeit ermittelt, in der die Vorderkante des Empfangselements (S) als außerhalb eines normalen betrieblichen Zeitfensters befindlich erfasst wird; undeine Steuerung (22), die zur Ansteuerung des Motors (M1) betreibbar ist, um die Bewegung des Empfangselements (S) unter Berücksichtigung der Zeit zu steuern, in der das Empfangselement (S) als außerhalb des normalen betrieblichen Zeitfensters befindlich erfasst wird, und um das Empfangselement (S) zu einem richtigen Zeitpunkt (K) und mit einer Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist, dem bildtragenden Element zuzuführen.
- Vorrichtung zum Bewegen eines Empfangselements (S), das einen ersten Endabschnitt und einen zweiten, dem ersten Endabschnitt gegenüberliegenden Endabschnitt umfasst, in eine ausgerichtete Beziehung mit einem bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei die Vorrichtung folgendes umfasst:eine erste Antriebsgruppe (102) mit einem ersten Motor (M1), einem ersten Antriebselement (112) und einer ersten Antriebskupplung (108, 114), die den ersten Motor (M1) mit dem ersten Antriebselement verbindet;einen ersten Sensor (160a), der eine erste Vorderkante des ersten Endabschnitts des Empfangselements (S) erfasst;einen ersten Zeitgeber, der eine erste Zeit ermittelt, in der die Vorderkante des ersten Endabschnitts des Empfangselements (S) als außerhalb eines normalen betrieblichen Zeitfensters befindlich erfasst wird;eine zweite Antriebsgruppe (104) mit einem zweiten Motor (M2), einem zweiten Antriebselement (122) und einer zweiten Antriebskupplung (120, 124), die den zweiten Motor (M2) mit dem zweiten Antriebselement (122) verbindet;einen zweiten Sensor (160b), der eine zweite Vorderkante des zweiten Endabschnitts des Empfangselements (S) erfasst;einen zweiten Zeitgeber, der eine zweite Zeit ermittelt, in der die Vorderkante des zweiten Endabschnitts des Empfangselements (S) als außerhalb eines normalen betrieblichen Zeitfensters befindlich erfasst wird; undeine Steuerung, die zur Ansteuerung des ersten und zweiten Motors (M1, M2) betreibbar ist, um die Bewegung des ersten bzw. zweiten Endabschnitts des Empfangselements (S) unabhängig voneinander zu steuern, um die Zeit zu berücksichtigen, in der die erste und zweite Vorderkante als außerhalb des normalen betrieblichen Zeitfensters befindlich erfasst werden, und um das Empfangselement (S) zu einem richtigen Zeitpunkt und mit einer Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist, dem bildtragenden Element zuzuführen.
- Vorrichtung zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei die Vorrichtung folgendes umfasst:einen Motor (M1);ein Antriebselement (102), das in Eingriff mit dem Empfangselement (S) bringbar ist;eine Antriebskupplung (108, 114), die den Motor (M1) und das Antriebselement (112) miteinander verbindet;einen Sensor (160a,b), der die Vorderkante des Empfangselements (S) erfasst;einen Zeitgeber, der die zeitliche Verzögerung zwischen einer erwarteten Erfassungszeit und einer tatsächlichen Erfassungszeit des Empfangselements (S) ermittelt, zu der der Sensor (160a,b) die Vorderkante des Empfangselements (S) erfasst; undeine Steuerung (22), die derart betreibbar ist, dass der Motor (M1) die Bewegung des Empfangselements (S) auf eine Geschwindigkeit (230) beschleunigt, die größer als die Bildtransportgeschwindigkeit (220) ist, und zwar für eine Zeitdauer, die ausreichend bemessen ist, um die zeitliche Verzögerung zu berücksichtigen, und um die Bewegung des Empfangselements (S) auf eine Geschwindigkeit zu verzögern, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Vorrichtung zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei die Vorrichtung folgendes umfasst:einen Motor (M1);ein Antriebselement (102), das in Eingriff mit dem Empfangselement (S) bringbar ist;eine Antriebskupplung (108, 114), die den Motor (M1) und das Antriebselement (112) miteinander verbindet;einen Sensor (160a,b), der die Vorderkante des Empfangselements (S) erfasst;einen Zeitgeber, der die zeitliche Verzögerung zwischen einer erwarteten Erfassungszeit und einer tatsächlichen Erfassungszeit des Empfangselements (S) ermittelt, zu der der Sensor (160a,b) die Vorderkante des Empfangselements (S) erfasst; undeine zur Ansteuerung des Motor betreibbare Steuerung (22), um die Bewegung des Empfangselements (S) nach Erfassung durch den Sensor (160a,b) anzuhalten, um die Bewegung des Empfangselements (S) auf eine Geschwindigkeit (230) zu beschleunigen, die größer als die Bildtransportgeschwindigkeit (220) ist, und zwar für eine Zeitdauer, die ausreicht, um die Verzögerungszeit zu berücksichtigen, undum die Bewegung des Empfangselements (S) auf eine Geschwindigkeit zu verzögern, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Vorrichtung zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei die Vorrichtung folgendes umfasst:einen Motor (M1);ein Antriebselement (102), das in Eingriff mit dem Empfangselement (S) bringbar ist;eine Antriebskupplung (108, 114), die den Motor (M1) und das Antriebselement (112) miteinander verbindet;einen Sensor (160a,b), der die Vorderkante des Empfangselements (S) erfasst; undeine zur Ansteuerung des Motor (M1) betreibbare Steuerung (22), um die Bewegung des Empfangselements (S) für eine Zeitdauer anzuhalten, die ausreicht, um einen Spalt zwischen dem Empfangselement (S) und einem vorausgehenden Empfangselement (S) zu wahren, und zwar auf Basis einer von dem Sensor (160a,b) erfassten Zeit, und um die Bewegung des Empfangselements (S) auf eine Geschwindigkeit zu beschleunigen, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Vorrichtung zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei die Vorrichtung folgendes umfasst:einen Motor (M1);ein Antriebselement (102), das in Eingriff mit dem Empfangselement (S) bringbar ist;eine Antriebskupplung (108, 114), die den Motor (M1) und das Antriebselement (112) miteinander verbindet;einen Sensor (160a,b), der die Vorderkante des Empfangselements (S) erfasst; undeine zur Ansteuerung des Motor (M1) betreibbare Steuerung (22), um die Bewegung des Empfangselements (S) auf eine Geschwindigkeit (240, 250) zu verzögern, die ausreichend niedrig ist, um einen Spalt zwischen dem Empfangselement (S) undeinem vorausgehenden Empfangselement (S) zu wahren, und zwar auf Basis einer von dem Sensor (160a,b) erfassten Zeit, und um die Bewegung des Empfangselements (S) auf eine Geschwindigkeit zu beschleunigen, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Verfahren zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei das Verfahren folgende Schritte umfasst:Ermitteln, dass das Empfangselement (S) an dem Registersystem (100) innerhalb einer Zeitdauer eingetroffen ist, die außerhalb eines normalen betrieblichen Zeitfensters liegt;Steuern der Bewegung des Empfangselements (S) zur Berücksichtigung der Zeitdauer, um die das Empfangselement (S) außerhalb des normalen betrieblichen Zeitfensters eingetroffen ist; undZuführen des Empfangselements (S) zum bildtragenden Element zu einem richtigen Zeitpunkt (K) und mit einer Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Verfahren zum Bewegen eines Empfangselements (S), das einen ersten Endabschnitt und einen zweiten, dem ersten Endabschnitt gegenüberliegenden Endabschnitt umfasst, in eine ausgerichtete Beziehung mit einem bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei das Verfahren folgende Schritte umfasst:Ermitteln, dass der erste Endabschnitt des Empfangselements (S) an dem Registersystem (100) innerhalb einer ersten Zeitdauer eingetroffen ist, die außerhalb eines normalen betrieblichen Zeitfensters liegt;Ermitteln, dass der zweite Endabschnitt des Empfangselements (S) an dem Registersystem (100) innerhalb einer zweiten Zeitdauer eingetroffen ist, die außerhalb eines normalen betrieblichen Zeitfensters liegt;unabhängiges Steuern der Bewegung des ersten und zweiten Endabschnitts des Empfangselements (S), um die erste bzw. zweite Zeitdauer zu berücksichtigen; undZuführen des Empfangselements (S) zum bildtragenden Element zu einem richtigen Zeitpunkt (K) und mit einer Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Verfahren zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei das Verfahren folgende Schritte umfasst:Ermitteln, dass das Empfangselement (S) an dem Registersystem (100) um eine Zeitdauer später als zu einer erwarteten Ankunftszeit eingetroffen ist;Beschleunigen der Bewegung des Empfangselements (S) auf eine Geschwindigkeit (230), die größer als die Bildtransportgeschwindigkeit (220) ist, und zwar für eine Zeitdauer, die ausreichend bemessen ist, um die zeitliche Verzögerung zu berücksichtigen; undVerzögern der Bewegung des Empfangselements (S) auf eine Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Verfahren zum Bewegen eines Empfangselements (S) nach Anspruch 9, das zudem folgende Schritte umfasst:Stoppen der Bewegung des Empfangselements (S) für eine Zeitdauer vor Durchführen des Schrittes zur Beschleunigung der Bewegung des Empfangselements.
- Verfahren zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei das Verfahren folgende Schritte umfasst:Ermitteln, dass das Empfangselement (S) an dem Registersystem (100) um eine Zeitdauer später als zu einer erwarteten Ankunftszeit eingetroffen ist; undVerzögern der Bewegung des Empfangselements (S) direkt aus einer Eintrittsgeschwindigkeit (210) auf eine Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist, und zwar zu einem Zeitpunkt, der unter Berücksichtigung der Verspätungsdauer gewählt ist.
- Verfahren zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei das Verfahren folgende Schritte umfasst:Ermitteln, dass das Empfangselement (S) an dem Registersystem (100) um eine Zeitdauer später als zu einer erwarteten Ankunftszeit eingetroffen ist;Abstimmen der Bewegung des Empfangselements (S) für eine Zeitdauer auf eine variable Geschwindigkeit (240), die unter Berücksichtigung der Verspätungsdauer gewählt ist; undAbstimmen der Bewegung des Empfangselements (S) auf eine Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Verfahren zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei das Verfahren folgende Schritte umfasst:Ermitteln, dass das Empfangselement (S) an dem Registersystem (100) um eine Zeitdauer früher als zu einer erwarteten Ankunftszeit eingetroffen ist;Anhalten der Bewegung des Empfangselements (S) für eine Zeitdauer, die ausreichend bemessen ist, um die Zeitdauer zu berücksichtigen, um die das Empfangselement (S) zu früh eingetroffen ist; undBeschleunigen der Bewegung des Empfangselements (S) auf eine Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
- Verfahren zum Bewegen eines Empfangselements (S) nach Anspruch 13, das zudem folgenden Schritt umfasst:Ermitteln, dass das Empfangselement (S) nicht von einem Spurlängssensor (162a, 162b) erfasst worden ist, bevor die Bewegung des Empfangselements (S) für eine Zeitdauer angehalten wird.
- Verfahren zum Bewegen eines Empfangselements (S) in eine passgenau ausgerichtete Beziehung mit einem sich bewegenden, bildtragenden Element, das sich mit einer Bildtransportgeschwindigkeit (220) bewegt, wobei das Verfahren folgende Schritte umfasst:Ermitteln, dass das Empfangselement (S) an dem Registersystem (100) um eine Zeitdauer früher als zu einer erwarteten Ankunftszeit eingetroffen ist;Verzögern der Bewegung des Empfangselements (S) auf eine Geschwindigkeit (250), die ausreichend niedrig ist, um die Zeitdauer zu berücksichtigen, um die das Empfangselement (S) zu früh eingetroffen ist; undBeschleunigen der Bewegung des Empfangselements (S) auf eine Geschwindigkeit, die im Wesentlichen gleich der Bildtransportgeschwindigkeit (220) ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US698513 | 1991-05-10 | ||
US09/698,513 US6570354B1 (en) | 2000-10-27 | 2000-10-27 | System and method for increased sheet timing operation window for registration |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1202124A2 true EP1202124A2 (de) | 2002-05-02 |
EP1202124A3 EP1202124A3 (de) | 2009-06-03 |
Family
ID=24805581
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01124333A Withdrawn EP1202124A3 (de) | 2000-10-27 | 2001-10-22 | Vorrichtung und Verfahren für ein vergrössertes betriebliches Zeitfenster zur passgenauen Ausrichtung von Empfangsbogen |
Country Status (5)
Country | Link |
---|---|
US (1) | US6570354B1 (de) |
EP (1) | EP1202124A3 (de) |
JP (1) | JP2002192781A (de) |
CA (1) | CA2359017C (de) |
DE (1) | DE10151989A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1791029A3 (de) * | 2005-08-30 | 2007-06-13 | Xerox Corporation | Systeme und Verfahren zur Medienregistrierung |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7108189B2 (en) * | 2003-06-30 | 2006-09-19 | Progressive Tool & Industries Co. | Precise transport positioning apparatus using a closed loop controlled, non-direct drive or friction drive system with absolute positioning encoder |
FR2857655A1 (fr) * | 2003-07-18 | 2005-01-21 | Asitrade Ag | Procede pour aligner une matiere en feuille defilant dans une machine la travaillant et dispositif pour la mise en oeuvre du procede |
JP4497891B2 (ja) * | 2003-10-31 | 2010-07-07 | キヤノン株式会社 | 記録装置と搬送制御装置 |
US20060156876A1 (en) * | 2005-01-19 | 2006-07-20 | Pitney Bowes Incorporated | Motion control system and method for a high speed inserter input |
US7396009B2 (en) * | 2005-09-19 | 2008-07-08 | Lexmark International Inc. | Method and device for correcting pick timing in an image forming device |
DE102006002029A1 (de) * | 2006-01-13 | 2007-07-19 | Bielomatik Jagenberg Gmbh + Co. Kg | Vorrichtung zum Abbremsen von auf einem Stapel abzulegenden Bögen, insbesondere Papier-oder Kartonbögen |
US7694962B2 (en) * | 2006-12-04 | 2010-04-13 | Canon Kabushiki Kaisha | Sheet conveying apparatus and image forming apparatus |
US7752948B2 (en) * | 2006-12-01 | 2010-07-13 | Pitney Bowes Inc. | Method and apparatus for enhanced cutter throughput using an exit motion profile |
ES2386952T3 (es) | 2009-10-02 | 2012-09-07 | Asitrade Ag | Método para fabricar una disposición de compuesto de múltiples capas para colocar un elemento a modo de lámina en un soporte en la unidad de estratificación y unidad de estratificación |
JP5482338B2 (ja) * | 2010-03-17 | 2014-05-07 | 株式会社リコー | 画像形成装置 |
WO2021045777A1 (en) * | 2019-09-06 | 2021-03-11 | Hewlett-Packard Development Company, L.P. | Rotatably mounted idler |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5322273A (en) * | 1993-05-18 | 1994-06-21 | Eastman Kodak Company | Sheet registration mechanism |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5094442A (en) | 1990-07-30 | 1992-03-10 | Xerox Corporation | Translating electronic registration system |
US5078384A (en) * | 1990-11-05 | 1992-01-07 | Xerox Corporation | Combined differential deskewing and non-differential registration of sheet material using plural motors |
US5262937A (en) * | 1991-10-22 | 1993-11-16 | Eastman Kodak Company | Technique for precise color-to-color registration in thermal printers |
US5731680A (en) | 1995-06-29 | 1998-03-24 | Eastman Kodak Company | Method and apparatus for registering a sheet with an image-bearing member |
JPH11223969A (ja) * | 1998-02-06 | 1999-08-17 | Fuji Xerox Co Ltd | 画像形成装置 |
JP2000118783A (ja) * | 1998-10-16 | 2000-04-25 | Canon Inc | 画像形成装置 |
JP2000143036A (ja) * | 1998-11-09 | 2000-05-23 | Canon Inc | 画像処理装置 |
-
2000
- 2000-10-27 US US09/698,513 patent/US6570354B1/en not_active Expired - Lifetime
-
2001
- 2001-10-12 CA CA002359017A patent/CA2359017C/en not_active Expired - Fee Related
- 2001-10-22 DE DE10151989A patent/DE10151989A1/de not_active Withdrawn
- 2001-10-22 EP EP01124333A patent/EP1202124A3/de not_active Withdrawn
- 2001-10-25 JP JP2001328213A patent/JP2002192781A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5322273A (en) * | 1993-05-18 | 1994-06-21 | Eastman Kodak Company | Sheet registration mechanism |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1791029A3 (de) * | 2005-08-30 | 2007-06-13 | Xerox Corporation | Systeme und Verfahren zur Medienregistrierung |
US7717533B2 (en) | 2005-08-30 | 2010-05-18 | Xerox Corporation | Systems and methods for medium registration |
Also Published As
Publication number | Publication date |
---|---|
EP1202124A3 (de) | 2009-06-03 |
DE10151989A1 (de) | 2002-05-08 |
CA2359017A1 (en) | 2002-04-27 |
US6570354B1 (en) | 2003-05-27 |
CA2359017C (en) | 2005-02-01 |
JP2002192781A (ja) | 2002-07-10 |
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