DE102006060289A1 - Method for feeding printed material from reel to sheet cutter and then to output table and orienting unit comprises accelerating material or feeding it at same speed from stage to stage - Google Patents

Abstract

The method for feeding printed material from a reel (118) to a sheet cutter (120) and then to an output table (150) and/or orienting unit (160) comprises accelerating the material or feeding it at the same speed from stage to stage. An independent claim is included for a printing system for carrying out the method.

Description

The The present invention relates to a method for conveying Substrate having the features of the preamble of claim 1.

Farther The present invention relates to a printing material processing Machine having the features of the preamble of claim 10.

Out The prior art is sheet-fed lithographic offset printing presses known. These are for the most part Part delivered only with sheet feeder, which the substrate in Feed the form of substrate sheet to the printing units. The printing material sheets are thereby isolated at the trailing edge of a pile of sheets, from a standstill accelerates and fumbles over one Anlagetisch led to the first printing unit. Be on the investment table the sheets are moved to registration register against a stop and abruptly stopped, causing a disadvantageous compression bow or damage the bow edge can come. The bows are then from taken over a feed cylinder and accelerated from standstill to machine speed.

moreover are also known printing presses, which with at the leading edge isolated sheet feeders are equipped. In such machines the substrate is not underfolded promoted to the first printing unit, wherein the substrate also stops for a short time to align and subsequently speeding up at machine speed, which also causes it can lead to adverse compression and damage to the bow.

One Part of the printing machines is also equipped with a roller feeder, which the subsidized with essentially machine speed Substrate in the form of a printing substrate supplies, and a roller cross cutter delivered. The role is accelerated from standstill and cut the web across. The generated sheets are first accelerated and then delayed again to build a subsoil. The delayed scale flow is through the except Promoted operation fed sheet feeder and over the investment table to the promoted first printing unit. There the sheet feeder except Operation is set, are essential functional units such. B. suction head, stacking plate, flap shaft, side stops, Stapelzentrierung and / or ventilation off. Again, the bows are at a stop for alignment stopped and then accelerated to machine speed. When using a roller feeder The substrate is thus accelerated and delayed several times, which to problems in Bedruckstofflauf, in particular to adverse compression and damage to lead can. Because of performing of the substrate by the except Operation set sheet feeder are the substrate and printing material conveying elements not everywhere freely accessible. Further needed a printing machine with sheet feeder and roller feeder more footprint than a printing machine with only one sheet feeder.

Such machines or their units is for example in the DE 101 03 040 A1 . DE 103 51 305 A1 , DE-AS 20 10 467 or in the DE 101 19 408 A1 described.

From the EP 1 394 091 A1 a method and apparatus for feeding a laser printer with cut sheets is known. The individual sheets are made from a paper web 8th by means of a cross cutter 12 transversely cut and periodically fed by an intermittent drive not unterschuppt, ie the substrate is constantly accelerated and decelerated. From JP 62-100362 is an electrophotographic device with roll feed 10 and sheeter 13 for printing material 11 known. The cross-cut substrate sheets are not conveyed underfolded. From JP 2002-225371 A, an ink jet printer is known, the means of a knife 1 from a web transversely cut sheets are not fed unterschuppt. An accurate registration of the sheets is not mentioned in the documents.

From the DE 44 06 740 A1 is a device for investment and pass correction before sheet transfer by a position correction with a linearly driven alignment known. From the DE 600 02 942 T2 a device for positioning paper sheets by means of a longitudinally, transversely and obliquely movable plate in the feed station of a printing machine is known. In the still unpublished DE 10 2005 029 931 a device for transporting sheets to a sheet-processing machine is described.

It An object of the present invention is an alternative method to promote of substrate, in particular an improved process to create, which overcomes the disadvantages of the prior art.

It is another or alternative object of the present invention, a simplified method for conveying substrate and / or to create a simplified Bedruckstofflauf.

It is a further or alternative object of the present invention to provide a method for conveying of printing material, which is a trouble-free, error-free and damage-free conveying of Printing material allows.

It It is an object of the present invention to provide an alternative substrate to create a processing machine, in particular an improved one To create a machine which overcomes the disadvantages of the prior art.

It is another or alternative object of the present invention, a printing material processing machine, in particular a printing press, to provide which a simplified conveying of substrate and / or allows a simplified Bedruckstofflauf.

It is another or alternative object of the present invention, a printing material processing machine, in particular a printing press, to create a disruptive, faultless and damage free Promote of substrate allows.

These Tasks are performed according to the invention a method with the features of claim 1 or by a Machine with the features of claim 10 solved.

advantageous Further developments of the invention are contained in the subclaims.

One inventive method to promote of printing material along a conveying path of a printing material feeder to a printing material processing sheet Unit, in particular to a printing unit, wherein the printing substrate is aligned, characterized in that the acceleration of the printing material at each point of the conveying path larger or is essentially zero.

According to the invention is the substrate during conveying along the conveyor route no significant delays exposed, thereby advantageously a simplified Bedruckstofflauf and a disruptive, error- and damage-free conveying of the Printing material is achieved, in particular, become unfavorable Avoid compression of the substrate.

A in terms of optimizing the printing material supply advantageous Further development of the method according to the invention is characterized by the fact that the substrate as a substrate from a roll feeder to a cross cutter and as a printing material sheet from the cross cutter to the printing sheet processing unit promoted becomes.

A regarding the further optimization of the substrate feed along a beneficial short and from sources of interference, errors and damage free funding route advantageous development of the method according to the invention is characterized from that the substrate from the sheeter directly to a Plant table or to an alignment unit and from the investment table or the alignment unit to the printing material processing Unity promoted becomes.

A in terms of optimizing the printing material supply advantageous Further development of the method according to the invention is characterized by the fact that the substrate as a substrate sheet of a sheet feeder to the printing material sheet processing unit promoted becomes.

A in terms of variability the printing material supply advantageous development of the method according to the invention is characterized by the fact that in the case of a first print job the Substrate as printing substrate from a roll feeder to a Cross cutter and as printing material from the sheeter to the printing material sheet processing unit is promoted, and that at a second Print job of the substrate as a substrate sheet from a sheet feeder is promoted to the printing sheet processing unit.

A with regard to the separation and spacing of the printing material sheets advantageous development of the method is characterized characterized in that the printing material in the sheet feeder at the Leading edge are isolated. The printing material sheets are included preferably further promoted without Unterschuppung.

A in terms of promoting the substrate sheet at a constant or increasing speed and the fault, faultless and damage-free Alignment of the printing material sheet advantageous development of inventive method is characterized by the fact that the printing material sheets as overlap-free Consequence of spaced-apart substrate sheet be promoted.

A more regarding the promotion the substrate sheet at a constant or increasing speed and the fault, faultless and damage-free Alignment advantageous development of the method according to the invention is characterized characterized by the fact that the substrate at least on a partial route of the funding route longitudinal, is aligned in the transverse direction and / or in the angular direction.

Another with regard to the promotion of the printing material sheet with a constant or increasing speed and the trouble-free, error and damage-free alignment advantageous Development of the method according to the invention is characterized in that the printing material is aligned by a linearly driven register device.

A Inventive substrate processing machine, in particular a printing press, with a Number of units along a conveying path of the printing material, wherein the number of units is a printing feeder and a Alignment unit for aligning the substrate includes, as well with at least one control unit for controlling the conveying speeds of the units, characterized by the fact that the control unit the units controls such that the acceleration of the printing material larger or larger at each point of the conveyor is essentially zero.

According to the invention the printing substrate is in the substrate processing machine along the conveyor route no significant delays exposed, thereby advantageously a simplified Bedruckstofflauf and a disruptive, faultless and damage free Promote the printing material is achieved, in particular be unfavorable Avoid compression of the substrate.

The described, advantageous developments of the invention also in any combination according to advantageous developments of Invention.

The Invention as well as other advantages of the invention will become apparent below with reference to the drawings based on a preferred embodiment described in more detail.

The Drawings show:

1 a schematic side view of a device according to the invention;

2 a schematic side view of a device according to the invention.

In the drawings are the same or equivalent features each provided with the same reference numerals.

1 shows a schematic side view of a device according to the invention. The device can be designed as a printing material sheet processing machine: in this embodiment as a sheet-fed press 100 , The sheetfed press 100 includes in the direction of a conveying path 112 of the substrate 104 following units 102 : a substrate feeder 110 (preferably a roller feeder 110 alternatively or additionally, a sheet feeder 140 ), a sheeter 120 , an investment table 150 , an alignment unit 160 and at least one printing material sheet processing unit 170 (preferably a printing unit 170 , in particular a lithographic offset printing unit 170 ). Furthermore, the device according to the invention comprises a control unit 180 which communicate via signal and / or data connections with the other units 102 communicates.

The substrate 104 is used as printing substrate 116 from one in the roll feeder 110 recorded and unwindable substrate roll 118 from the roll feeder 110 to the cross cutter 120 promoted, which from the printing substrate 116 using a cross-cutting device 124 an overlap-free sequence of substrate sheets 122 generated.

From the sheeter 120 becomes the consequence of the printing material sheet 122 to the investment table 150 promoted, which, for example, a device 152 for detecting errors regarding double sheets and / or a device 154 for detecting errors in the sheet orientation in, transverse to or obliquely to the conveying direction 112 (Longitudinal / circumferential register, transverse direction / side register or angular direction / diagonal register).

The investment table 150 in the conveying direction 112 downstream is the alignment unit 160 , which the printing material sheets 164 aligned in the longitudinal, transverse and / or angular direction and adjusts the corresponding register or corrected if necessary. Alternatively, the alignment unit 160 also in the investment table 150 or in the printing unit 170 , there in particular in a feed cylinder 172 be integrated. The correction of the sheet alignment is preferably carried out by a in the conveying direction 112 at least on a part of the route 112 in the conveying direction 112 linearly reciprocable register means 162 , which the printing material sheet 164 For example, holds with suction pads and aligns depending on registry error. The register device 162 takes over the printing material sheet 164 , accelerates it - if necessary - to machine speed and directs it during the feeding movement to the printing unit 170 out.

At least in the conveying direction 112 aligned substrate sheet 164 is from the alignment unit 160 to the printing unit 170 promoted, in which the printing material sheet 164 preferably from a feed cylinder 172 taken over and to one with a printing cylinder, in particular a blanket cylinder 176 cooperating impression cylinder 174 is handed over. The printing unit 170 can be arranged downstream of other printing units, not shown, so that with the sheet-fed press 100 a - preferably two-sided - multi-color printing can be generated.

The device according to the invention comprises a control unit 180 which the other units 102 the device according to the invention controls such that the acceleration of the printing material at each point of the conveying path is greater than or substantially equal to zero.

In 1 In addition, the speed v of the conveyed substrate web or substrate sheet is shown, so that the respective speed v of a substrate 104 in one of the units 102 is recognizable.

The dashed representation 190 the speed v of the substrate 104 in the roll feeder 110 should clarify that the substrate roll 118 at the beginning of a print job from standstill to a roller speed v _{R is} accelerated. During the print job, however, the web speed v _R remains substantially constant.

After the process of cross-cutting in the cross cutter 120 becomes the substrate 104 , ie the substrate sheet, accelerated to a higher speed v _Q (line 191 ), between the successive printing material sheets 122 to generate a respective distance. The acceleration and thus the spacing can be achieved for example by driven conveyor belts or rollers, which are driven for example with a sinusoidal or sinusoidal velocity profile.

In the two following units 102 - Plant table 150 and alignment unit 160 - becomes the substrate 102 as shown initially promoted with the speed v _Q (line 192 ) and then from the register device 162 accelerated to a speed v _D (line 193 ), which essentially the speed of production or the machine speed of the printing unit 170 corresponds (line 194 ). Alternatively, the speed v of the printing substrate 104 from the position of cross cutting in the cross cutter 120 until transfer to the feed cylinder 172 be accelerated continuously - preferably linear - (line 191 and line 195 ). Further alternatively, the speed v of the printing substrate 104 after the spacing of the individual printing material sheets 122 from each other to handover to the feed cylinder 172 be promoted at constant speed v _D (line 196 and line 197 ).

• – Der Bedruckstoff 104 wird entlang eines Förderweges 112 zu der Bedruckstoff verarbeitenden Einheit, in diesem Ausführungsbeispiel zu dem Druckwerk 170 gefördert.
• – Der Bedruckstoff 104 kann bevorzugt als Bedruckstoffbahn 116 von dem Rollenanleger 110 zu dem Querschneider 120 gefördert werden. Alternativ kann der Bedruckstoff 104 als Bedruckstoffbogen 142 von einem Bogenanleger 140 zugeführt werden.
• – Der Bedruckstoff 104 kann – bei Zufuhr von dem Rollenanleger 110 – von dem Querschneider 120 quer geschnitten werden.
• – Der Bedruckstoff 104 kann als Bedruckstoffbogen 122 von dem Querschneider 120 zu dem Druckwerk 170 gefördert werden. Alternativ kann der Bedruckstoff 104 als Bedruckstoffbogen 142 von einem Bogenanleger 140 zugeführt werden. Das Fördern erfolgt in beiden Fällen vorzugsweise in Form eines überlappungsfreien Stromes bzw. einer Folge von Bedruckstoffbogen 122 bzw. 142, welche zueinander einen jeweiligen Abstand aufweisen.
• – Der Bedruckstoff 104 wird während des Fördervorganges ausgerichtet. In diesem Ausführungsbeispiel: Auf zumindest einer Teilstrecke des Förderweges 112 wird der Bedruckstoff 104 in Längsrichtung, in Querrichtung und/oder in Winkelrichtung ausgerichtet, d. h. Umfangs-, Seiten- und/oder Diagonalregister werden sofern erforderlich eingestellt.
• – Die Beschleunigung des Bedruckstoffs 104 ist an jeder Stelle des Förderweges größer oder im Wesentlichen gleich Null.

An inventive method for conveying printing material, which is carried out for example with the described device according to the invention, proceeds as follows:

• - The substrate 104 is along a conveyor route 112 to the printing material processing unit, in this embodiment, to the printing unit 170 promoted.
• - The substrate 104 can preferably be used as printing substrate 116 from the roll feeder 110 to the cross cutter 120 be encouraged. Alternatively, the printing material 104 as a printing material sheet 142 from a sheet feeder 140 be supplied.
• - The substrate 104 can - when feeding from the roll feeder 110 - from the sheeter 120 be cut across.
• - The substrate 104 can be used as a printing material sheet 122 from the sheeter 120 to the printing unit 170 be encouraged. Alternatively, the printing material 104 as a printing material sheet 142 from a sheet feeder 140 be supplied. The conveying takes place in both cases preferably in the form of an overlap-free stream or a sequence of printing material sheet 122 respectively. 142 , which have a respective distance to each other.
• - The substrate 104 is aligned during the conveying process. In this embodiment: On at least a part of the route 112 becomes the substrate 104 aligned in the longitudinal direction, in the transverse direction and / or in the angular direction, ie circumferential, lateral and / or diagonal registers are adjusted if necessary.
• - The acceleration of the substrate 104 is greater or substantially equal to zero at each point of the conveying path.

With the described device or when performing the method described is the substrate 104 promoted according to the invention such that the acceleration of the printing material 104 at each point of the conveying path is greater than or substantially equal to zero. In other words: the speed of the substrate 104 remains substantially constant or increases continuously or the speed profile is composed of essentially constant and / or increasing or rising sections - a decrease in speed, however, is essentially not. Advantageously, the printing material 104 by the inventive choice of the velocity profile or profile in a constantly stretched, compression-free state, ie as a substantially flat lying substrate, promoted and thus reduces the risk of printing substrate damage or even avoided. In particular, a slowdown and thus an adverse upsetting of the printing material 104 and a stop and sudden stop of the substrate 104 avoided.

Furthermore, slippage of the printing material on driven suction belts is advantageously prevented at a uniform or constantly increasing speed. At a stop the Substrate feed must also be slowed down by the belts that transport the substrate. Lying - as described with reference to advantageous embodiments - the bow not shingled, but individually, the sheets can be braked on the suction belts without slippage and thus damage.

Optionally, ie with appropriate provision of an additional unit 102 and an additional operating mode, the substrate can 104 also from a sheet feeder 140 with preferred separation of the printing material sheet 142 be fed at the front edge. The roll feeder 110 and the sheeter 120 are out of operation in this mode. The printing material sheets 142 be in the sheet feeder 140 from standstill to speed v _B or v _D accelerated (line 198 or line 199 ) and as a stream of successive and spaced-apart substrate sheet to the printing unit 170 promoted.

In the 1 Speeds represented represent preferred, simplified speed profiles. However, further speed profiles are possible within the meaning of the invention.

In 2 a device according to the invention is shown. The printing material web 116 is from a substrate roll 118 unwound and from a cross cutter 124 , For example, a rotary cross cutter with a rotating upper blade and a lower blade, to printing material sheet 122 cut across. The printing material sheets 122 become a register device 162 promoted, which the printing material sheet 122 aligned in the longitudinal, circumferential and / or angular direction. Thereafter, the printing material sheet 122 to a gripper bridge 173 passed a Zuführzylinders, the printing material sheet 122 to cylinders 174 and 176 a first printing unit leads. Alignment can be completed by the register device 162 However, it may also be provided that the orientation partly by the register device 162 and partly by a movable gripper bridge 173 he follows. Alternatively, the alignment can also be completed by a movable gripper bridge 173 respectively.

The substrate 104 does not pass through a sheet feeder and Unterschuppungseinheit in this embodiment, ie the substrate sheet 122 gets directly from the sheeter 120 to an investment table 150 or directly to the alignment unit 160 promoted. The substrate 104 is not significantly delayed, but promoted with an acceleration greater or substantially equal to zero. The printing substrate is preferred 104 always slightly accelerated, which causes the substrate is always promoted under a slight train and compression can be avoided in an advantageous manner.

100

Sheetfed

102

units

104

substrate

110

roll feeder

112

Conveyor / conveying direction

116

printing material

118

printing material

120

Sheeter

122

printing material

124

Cross-cutting device

140

sheet feeder

142

printing material

150

feed table

152

Facility for error detection

154

Facility for error detection

160

alignment

162

register means

164

printing material

170

printing unit

172

feed cylinder

173

gripper

174

Impression cylinder

176

Blanket cylinder

180

control unit

190-199

speeds

v

Bedruckstoffgeschwindigkeit

v _B

Bedruckstoffgeschwindigkeit

v _R

roller speed

v _Q

Bedruckstoffgeschwindigkeit

Claims (10)

Method for conveying printing material along a conveying path from a printing material feeder ( 110 . 140 ) to a printing sheet processing unit ( 170 ), whereby the printing material ( 164 ), characterized in that the acceleration of the printing substrate ( 104 . 116 . 122 . 142 . 164 ) at each point of the route ( 112 ) is greater than or substantially equal to zero. A method according to claim 1, characterized in that the printing substrate ( 104 . 116 ) as printing substrate ( 116 ) from a roll feeder ( 110 ) to a sheeter ( 120 ) and as a printing material sheet ( 122 ) from the cross cutter ( 120 ) to the printing material sheet processing unit ( 170 ). A method according to claim 2, characterized in that the printing substrate ( 104 . 116 ) from the cross cutter ( 120 ) directly to a feed table ( 150 ) or to an alignment unit ( 160 ) and from the feed table ( 150 ) or the alignment unit ( 160 ) to the printing material sheet processing unit ( 170 ). A method according to claim 1, characterized in that the printing substrate ( 104 . 142 ) as a printing material sheet ( 142 ) from a sheet feeder ( 140 ) to the printing material sheet processing unit ( 170 ). Method according to Claim 1, characterized in that - in the case of a first print job, the printing stock ( 104 . 116 ) as printing substrate ( 116 ) from a roll feeder ( 110 ) to a sheeter ( 120 ) and as a printing material sheet ( 122 ) from the cross cutter ( 120 ) to the printing material sheet processing unit ( 170 ), and - that during a second print job the substrate ( 104 . 142 ) as a printing material sheet ( 142 ) from a sheet feeder ( 140 ) to the printing material sheet processing unit ( 170 ). Method according to claim 4 or 5, characterized in that the printing material sheets ( 142 ) in the sheet feeder ( 140 ) are separated at the front edge. A method according to claim 1, characterized in that the printing material ( 122 . 142 ) as a non-overlapping sequence of printing material sheets ( 122 . 142 ). A method according to claim 1, characterized in that the printing substrate ( 104 . 116 . 122 . 142 . 164 ) at least on a part of the route ( 112 ) is aligned in the longitudinal direction, in the transverse direction and / or in the angular direction. A method according to claim 8, characterized in that the printing substrate ( 104 . 116 . 122 . 142 . 164 ) from a linearly driven register device ( 162 ) is aligned. Substrate processing machine, in particular printing press, with a number of units ( 102 ) along a conveying path ( 112 ) of the printing substrate ( 104 . 116 . 122 . 142 . 164 ), where the number of units ( 102 ) a printing material feeder ( 110 . 140 ) and an alignment unit ( 160 ) for aligning the substrate ( 104 . 116 . 122 . 142 . 164 ) and with at least one control unit ( 180 ) for controlling the conveyor speeds of the units ( 102 ), characterized in that the control unit ( 180 ) the units ( 102 ) in such a way that the acceleration of the printing material ( 104 . 116 . 122 . 142 . 164 ) at each point of the route ( 112 ) is greater than or substantially equal to zero.