CN1328065C - Two-face printing device - Google Patents
Two-face printing device Download PDFInfo
- Publication number
- CN1328065C CN1328065C CNB2004100785963A CN200410078596A CN1328065C CN 1328065 C CN1328065 C CN 1328065C CN B2004100785963 A CNB2004100785963 A CN B2004100785963A CN 200410078596 A CN200410078596 A CN 200410078596A CN 1328065 C CN1328065 C CN 1328065C
- Authority
- CN
- China
- Prior art keywords
- printing
- plate
- paper
- making
- face
- 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.)
- Expired - Fee Related
Links
Images
Abstract
To provide single-process both sides printing equipment which enables attainment of an excellent printed matter having no density difference between the obverse and reverse sides.The both sides printing equipment 1 has a printing part 2 having a plate cylinder 11 and a pressing means 12, a platemaking part 3 having a thermal head 41 and a platen roller 41 and making a divided platemaking master 14 having a first platemaking image and a second platemaking image in the direction of the length of a master 21, a feeding part 4, a delivery part 6, an auxiliary tray 8 temporarily storing front-printed paper, a refeeding means 9, and a switching member 10 guiding the paper P to either the auxiliary tray 8 or the delivery part 6, and a reverse-printing process is conducted after the obverse-printing process is performed. In this equipment 1, a control means 35 which controls the impression energy on the thermal head 41 in the respective platemaking of the first platemaking image and the second platemaking image, is provided.(C)2005,JPO&NCIPI.
Description
Technical field
The present invention relates to a kind of printing equipment, say in detail to relate to a kind of two-face printing device that can in an operation, print on the two sides of paper.
Background technology
As everyone knows, existing simple printing process has digital plate for thermal sensitive porous printing.The hole plate print device that this porous printing is used is by making the heat head contact that small heater element is configured to row on key plate, on one side and one side the heater element pulsed energization is transported key plate, thereby according to image information the key plate heating and melting is bored a hole.And, key plate is wrapped on the outer peripheral face of perforated cylinder shape printing cylinder after, be situated between and push the outer peripheral face of printing cylinder by press devices such as pressure rollers, thereby make printing ink see through and it is transferred on the paper and obtain printing image from the key plate perforated portion by paper.
In recent years, this porous printing is frequently carried out the two-face printing that prints on the two sides of paper gradually from taking care of purposes such as space in order to reduce paper consumption and file.This two-face printing by in existing method the paper that is placed on paper feed part to Printing Department's paper injection, in one side printing back paper is turned over and carries out the printing of another side to Printing Department's paper injection once more, thereby obtain the two-face printing thing.It has need be once being placed into paper feed part once more also the problem points of the troublesome poeration of the alignment of the paper after being printed on one side by the paper of row's paper.And, owing to carried out paper injection twice to Printing Department, thus on pure printing time, compare the time that also needs twice with being printed on one side, and too time taking problem is arranged.
In order to solve described problem, a kind of two-face printing device is disclosed in the flat 6-71996 communique and for example open the spy of Japan, it comprises: first printing cylinder; Second printing cylinder, it disposes relatively by sheet conveying Lu Eryu first printing cylinder; The contact separating device, it is in contact with one another the outer peripheral face of the outer peripheral face of first printing cylinder and second printing cylinder and leaves, and this two-face printing device makes crimping between each printing cylinder and obtain the two-face printing thing in an operation by making the action of contact separating device.
In addition, for example open disclosed a kind of two-face printing device in the flat 8-90893 communique the spy of Japan, it comprises: first printing cylinder; First press device, but it is arranged to by configuration and the crimping relatively of sheet conveying Lu Eryu first printing cylinder, leaves first printing cylinder; Second printing cylinder, it is positioned at the sheet conveying direction downstream of first printing cylinder and is configured in a side relative with first printing cylinder by the sheet conveying road; Second press device, but it is arranged to by configuration and the crimping relatively of sheet conveying Lu Eryu second printing cylinder, leaves second printing cylinder, and this two-face printing device obtains the two-face printing thing by making second printing cylinder and the second press device crimping after making first printing cylinder and the first press device crimping in an operation.
In addition, the two-face printing device of opening disclosed printing process in the flat 8-332768 communique and carrying out this printing process the spy of Japan for example, this printing process comprises following operation: first operation, the key plate that its use is arranged with first plate-making picture and second plate-making picture, two images on the direction of rotation of printing cylinder gradation has been made a plate, image-region corresponding to any plate-making picture, pressure roller is rotated with printing cylinder while being in direct contact with on the printing cylinder, the first printing copying image corresponding with plate-making picture on the outer peripheral face of pressure roller; Second operation, its image-region by making another plate-making picture after first operation makes pressure roller rotate with printing cylinder while contacting on printing cylinder by the paper corresponding with the first printing image, on first corresponding, duplicate the first printing image again with the pressure roller of paper in corresponding second of the printing cylinder of paper on duplicate with another plate-making picture corresponding second print image.Thereby in an operation, obtain the two-face printing thing.
And then, for example open disclosed two-face printing device in the 2003-200645 communique the spy of Japan, the key plate that it uses gradation to make a plate, transport first paper and behind its positive any plate-making picture of printing, this paper is guided into auxiliary tray from paper feed part, transporting second paper from paper feed part and behind its positive any plate-making picture of printing, this paper is being guided into auxiliary tray, first paper carried out paper feeding again and at arbitrary another plate-making picture of its back face printing from auxiliary tray simultaneously, this paper is discharged to discharge tray, in an operation, obtain the two-face printing thing by carrying out above action continuously.
Summary of the invention
Open in the disclosed technology of flat 6-71996 communique because its structure is two printing cylinders to be disposed and make their mutual crimping up and down the spy of Japan, even so when being printed on one side, also need to make crimping between each printing cylinder, therefore key plate that just must package has been made a plate on a printing cylinder respectively and package is not made a plate on another printing cylinder key plate have the problem of key plate effective consumption when being printed on one side.And have two mutual crimping of printing cylinder that are used for key plate is remained on the clamper on the outer peripheral face respectively in order to make, just need each printing cylinder be separated from each other in the position that each clamper coincide mutually, owing to when print speed printing speed accelerates, area that printing cylinder is in contact with one another is reduced image-region is reduced, so the problem of the noise that generation is big when being difficult in order to ensure image-region increases the external diameter of each printing cylinder with regard to needs equipment miniaturization contacted with each printing cylinder is arranged by this separation.
In addition, the spy of Japan open the disclosed technology of flat 8-90893 communique and above-mentioned similarly have when being printed on one side need package not be made a plate on a printing cylinder key plate and the problem of key plate effective consumption.And because arranged side by side two printing cylinder serials on the sheet conveying direction, so compare with the printing equipment of the usefulness that is printed on one side, its device volume increases nearly twice, has to be difficult to guarantee that it is provided with the problem in space.
Open disclosed technology in the flat 8-332768 communique owing to be that in first plate-making picture and second plate-making picture (direct picture and reverse side image) any directly duplicated to paper from printing cylinder the spy of Japan, and another after duplicating, is duplicated to paper by pressure roller again, so compare with the concentration of the printing image that directly duplicates to paper, the concentration of the printing image that duplicates again to paper from pressure roller reduces, and the different problem of printing image color of obverse and reverse on the paper is arranged.
The spy of Japan opens that disclosed technology can solve above-mentioned all problem points in the 2003-200645 communique, and obtains good two-face printing thing.But recognize that from result of experiment such as present inventors it has following problem.Promptly this two-face printing device will be by being crimped on any that the relative printing cylinder outer peripheral face of paper freedom on the printing cylinder is approaching, switching part that be provided with is guided auxiliary tray or discharge tray into with leaving by pressure roller, and this switching part is arranged on the positive back of printing cylinder and pressure roller contact position.Guide the paper of auxiliary tray into and peel off from the outer peripheral face of printing cylinder by occupying near the switching part of printing cylinder outer peripheral face position, the paper of guiding discharge tray into is by being arranged near the peeling member the printing cylinder outer peripheral face and peel off from the outer peripheral face of printing cylinder.The paper of guiding the paper of auxiliary tray into and guiding discharge tray into all floats its leading section by blowing from the air-supply arrangement that is arranged on the peeling member top when the printing cylinder outer peripheral face is peeled off, and peels off by the leading section of switching part or peeling member is inserted in its gap.At this moment blow and be subjected to the obstruction of peeling member in the top that is arranged on peeling member owing to air-supply arrangement, so the paper that utilizes switching part to peel off from the printing cylinder outer peripheral face is compared with the paper that utilizes peeling member to peel off from the printing cylinder outer peripheral face, the time that contacts with printing cylinder is long, consequently by producing concentration difference from the printing ink transfer amount of printing cylinder at the positive and negative of paper.
The object of the present invention is to provide a kind of single operation two-face printing device, it can solve the above problems a little, do not use invalid key plate and can be printed on one side, suppress the increase in space is set, and can in an operation, obtain the good printed article that positive and negative does not have concentration difference.
Two-face printing device of the present invention comprises: Printing Department, and it has the press device that printing cylinder can freely contact with described relatively printing cylinder, be provided with leaving; Plate-making portion, it has at the heat head of the enterprising eleven punch 11 of key plate plate-making and transports the platen roller of key plate, and it has corresponding to first plate-making picture of direct picture with corresponding to the key plate that the gradation of second plate-making picture of reverse side image has been made a plate makes a plate on the length direction of key plate; Paper feed part transports paper to described Printing Department; Row's paper portion, the paper discharge that it prints and finish printing in described Printing Department; Auxiliary tray, it leaves the paper that front that described Printing Department formed direct picture finishes printing in temporarily; Paper feeder again, it leaves on the described auxiliary tray the positive paper that finishes printing in delivers to described Printing Department again; Switching part, its paper that has passed through described Printing Department is to a certain side's channeling conduct of described auxiliary tray or described row's paper portion, the back face printing operation of this two-face printing device printing reverse side image on the another side that carries out behind the front printing process that is carried out at printing direct picture on the one side of described paper at described paper, it has control device, its control gives the energy that applies of described heat head, is used in the plate-making of carrying out described first plate-making picture and gives energy gives described heat head less than being used to carry out the plate-making of described second plate-making picture the energy that applies that applies of described heat head.
According to the present invention, be lower than printing cylinder and paper short second plate-making picture energy that the thermotropism head applies when making a plate time of contact by first plate-making picture energy that the thermotropism head applies when making a plate that makes printing cylinder and paper length time of contact, thereby make the perforation footpath of the perforation footpath of first plate-making picture less than second plate-making picture, and in identical time of contact with by second plate-making picture, compare to the quantity of ink that the another side of paper duplicates from printing cylinder, the quantity of ink that inhibition is duplicated to the another side of paper from printing cylinder by first plate-making picture, the generation of the concentration difference on paper two sides can be prevented thus, and the good two-face printing thing of concentration difference can be obtained not having at positive and negative.
Description of drawings
Fig. 1 is the signal front elevation that has adopted the two-face printing device major part of one embodiment of the invention;
Fig. 2 is the schematic diagram of the guidance panel of one embodiment of the invention use;
Fig. 3 is the block diagram of the control device of one embodiment of the invention use;
Fig. 4 be used for illustrating invention an embodiment variety classes key plate puncture probability and apply the curve map of energy decreases magnitude relation.
The specific embodiment
Fig. 1 has represented to adopt the two-face printing device of one embodiment of the invention.Because it is roughly the same that this two-face printing device and the spy of Japan open the structure of 2003-200645 number disclosed two-face printing device, so simplify explanation as far as possible to each position.
The two-face printing device 1 of Fig. 1 has: Printing Department 2, plate-making portion 3, paper feed part 4, row publishing department 5, row's paper portion 6, image are read portion 7, auxiliary tray 8, paper feeder 9, switching part 10 etc. again.
The Printing Department 2 that is configured in the apparatus main body substantial middle has printing cylinder 11 and as the pressure roller 12 of press device.Printing cylinder 11 rotations freely are bearing on the apparatus main body, and are driven in rotation by not shown printing cylinder drive unit.Printing cylinder 11 has on its outer peripheral face and opens and closes clamper 13 freely, during two-face printing on the outer peripheral face of printing cylinder 11 package the key plate 14 of having been made a plate by the gradation of plate-making portion 3 plate-making is arranged.On the key plate 14 that gradation has been made a plate, be formed with first plate-making picture of corresponding direct picture and second plate-making picture of corresponding reverse side image, between each plate-making picture, be formed with the part of not making a plate.On printing cylinder 11 package key plate 14 that gradation made a plate is arranged so that first plate-making picture positive zone corresponding shown in Figure 1, second plate-making picture to should the reverse side zone, plate-making part is to should zone line.Near the outer peripheral face of printing cylinder 11, be provided with the rotary encoder that not shown detection printing cylinder 11 positions are used.
Below printing cylinder 11, be provided with pressure roller 12.The two ends rotation that is had the pressure roller 12 that the elastomer of water proofing property constitutes by fluororesin etc. freely is bearing on the not shown arm member, and not shown arm member can freely be shaken by not shown agitating device supporting.Pressure roller 12 occupies its periphery selectively and is crimped on crimping position on the key plate 14 that gradation has been made a plate on the printing cylinder 11 from position and its periphery of leaving shown in Figure 1 that printing cylinder 11 leaves.Near the partial face of pressure roller 12, be provided with the cleaning roller 15 that contacts and clean with the partial face of pressure roller 12.Cleaning roller 15 is driven in rotation by not shown drive unit.
Be provided with paper feeding guide member 16 again near the right side of pressure roller 12, it is used for paper P that the front of sending from paper feeder 9 is again printed and transports along the periphery of pressure roller 12.Be provided with paper feeding alignment roller 17 again below pressure roller 12, it is used to make the paper P that leaves on the auxiliary tray 8 to contact and send with the partial face of pressure roller 12.The delivery unit of paper feeding again 18 that has auxiliary tray 8 on the lower left of pressure roller 12 is provided with, paper feeding positioning element 19 is arranged to one with it again.Above paper feeding delivery unit 18 again, be provided with the paper support plate 20 that above auxiliary tray 8, moves freely.By these auxiliary trays 8, again paper feeding guide member 16, again paper feeding alignment roller 17, again paper feeding positioning element 19, paper feeding delivery unit 18 and paper support plate 20 have constituted paper feeder 9 again again.
In the left side of printing cylinder 11 with pressure roller 12 contact positions, the path of transporting of paper P is provided with switching part 10.Switching part 10 on apparatus main body, and moves the end free rotation ground supporting in its sheet conveying direction downstream by not shown mobile device, occupy the second place shown in primary importance shown in Fig. 1 solid line and the double dot dash line selectively.When switching part 10 occupies primary importance, be drawn towards row's paper portion 6 through the paper P between printing cylinder 11 and the pressure roller 12, when switching part 10 occupies the second place, then be drawn towards auxiliary tray 8.
Be provided with plate-making portion 3 in the upper right side of Printing Department 2.Plate-making portion 3 has the well-known structures such as key plate holding member 46, platen roller 40, heat 41, key plate shearing device 42, key plate storage part 43, a pair of idler roller 44, a pair of reverse roll 45 that keep key plate 21 is wound into the key plate cylinder of cylinder shape, and the key plate 14 of having made a plate in the 3 making gradation of plate-making portion.Platen roller 40 is controlled by control device 35 described later with hot 41 action.
Below plate-making portion 3, be provided with paper feed part 4.Paper feed part 4 has well-known structures such as paper feed tray, feeding-in roll, separate roller, separation pad, pair of registration rollers.
Discharge on the row publishing department 5 that is provided with on the upper left side of Printing Department 2 has version parts, down discharge version parts, discharge well-known structures such as a version case, compressive plate, the key plate 14 that the gradation that uses make a plate is peeled off and is discarded in discharge edition case from the outer peripheral face of printing cylinder 11.
The row of being provided with paper portion 6 below row publishing department 5.Row paper portion 6 has separation claw 31 as peeling member, row's paper delivery unit 32, discharge tray 33, peels off fan 34 etc. as air-supply arrangement.The outer layer surface that separation claw 31 is arranged to its leading section by not shown agitating device can be freely approaching, leave printing cylinder 11 is peeled off paper P from the outer peripheral face of printing cylinder 11 when occupying the approximated position.Row's paper delivery unit 32 has driven roller, driven voller, the belt that goes in ring, attract fan etc., while its paper P that finishes printing be attracted to the belt that goes in ring above transport to the direction of Fig. 1 arrow.Discharge tray 33 has an end-stopping plate and a pair of side shield, piles up the paper P that finishes printing in the above.Peel off fan 34 and be located at the top of separation claw 31, make the front printing process finish the finish front end of the paper P that back switching part 10 peels off from the outer peripheral face of printing cylinder 11 of the paper P that peels off from the outer peripheral face of printing cylinder 11 by switching part 10 back and back face printing operation by blowing and float by air-supply respectively to the outer peripheral face of printing cylinder 11.
Be provided with image on the top of apparatus main body and read portion 7.Image is read portion 7 and is had the contact glass that the placement original copy is used; The clamper that the contact glass that connects freely contacts, is provided with leaving; Scan and read the speculum and the fluorescent lamp of original image; The lens of the figure image focu of scanning; The imageing sensor that the image that focuses on is handled etc.
Fig. 2 represents the guidance panel of two-face printing device 1.The well-known structures such as display unit 28 that constitute except the display unit 27 that plate-making beginning key 23, printing beginning key 24, stop key 25, ten key 26 is arranged, constitute by 7 sections LED, by LCD on the guidance panel 22 of this figure, also be provided with: apply energy settings key 29, it is used for action by control platen roller 40 and heat 41 makes the energy variation that applies to key plate 21; Selector switch 30, it is that the control of transporting of the key plate 21 that is undertaken by platen roller 40 is switched to any switching device shifter of ON or OFF; Two-face printing key 47, it is pressed when carrying out two-face printing.
Fig. 3 is the block diagram of the control device of two-face printing device 1 use.The control device 35 of this figure is microcomputers that inside has CPU, ROM, RAM etc., and it reads portion 7, the action of paper feeder 9, switching part 10 again according to control Printing Department 2, plate-making portion 3, paper feed part 4, row publishing department 5, row's paper portion 6, image respectively from the actuating signal of not shown rotary encoder and guidance panel 22.
The action of the two-face printing device 1 when pressing two-face printing key 47 and carry out two-face printing according to said structure explanation below.
Original copy is fixed on image to be read in the portion 7, set various plate-making conditions and selector switch 30 placed by the operator and press plate-making beginning key 23 after " OFF ", image read portion 7 carry out original image read action in row publishing department 5 move and the key plate 14 that the gradation after the use has been made a plate peeled off from the outer peripheral face of printing cylinder 11.On key plate 21, form first plate-making picture by the action of plate-making portion 3 with second plate-making picture and make a plate into the key plate 14 that new gradation has been made a plate discharging the version back, it is wrapped on the printing cylinder 11.
After the package release, two-face printing device 1 becomes the printing holding state, press printing beginning key 24 by the operator then after having set various printing conditions, printing cylinder 11 is sent a piece of paper from paper feed part 4 separation and is opened P when being driven in rotation with the speed of setting.The paper P that is sent stops the back temporarily and transports between printing cylinder 11 and pressure roller 12 in the moment of regulation at the pair of registration rollers place.The setting of various printing conditions also can be carried out before pressing plate-making beginning key 23.
Rotate to the angle of regulation when printing cylinder 11, when its positive zone occupies the assigned position corresponding with pressure roller 12, pressure roller 12 is pressed on paper P on the key plate 14 that the gradation on the printing cylinder 11 made a plate by occupying crimping position, prints direct picture on one face.The paper P that the front prints is by floating its leading section from the air-supply of peeling off fan 34, the front end of the switching part 10 by occupying the second place and peeling off then from the outer peripheral face of printing cylinder 11, and transport to paper feeding delivery unit 18 again.At this moment, the front end of paper P is placed on the auxiliary tray 8 from its rear end side by 20 supportings of paper support plate.Paper P on the auxiliary tray 8 is by paper feeding delivery unit 18 again and transport to the direction of arrow of Fig. 1, stops under the state of paper feeding positioning element 19 in its preceding end in contact temporarily again.
Printing cylinder 11 is also continuing rotation during first paper P is drawn towards auxiliary tray 8, transports second paper P in the moment same with transporting first paper P from paper feed part 4.Second paper P and first paper P of being transported similarly print direct picture on one face by pressure roller 12, transport to paper feeding delivery unit 18 again by the switching part 10 that occupies the second place then.
After transporting out second paper P from paper feed part 4, the position moment a little earlier that arrives corresponding pressure roller 12 with the reverse side zone than printing cylinder 11 is carried out the action of paper feeding alignment roller 17 again, and first the paper P that leaves on the auxiliary tray 8 is crimped on the partial face of pressure roller 12.Be crimped on first paper P on pressure roller 12 partial face by being crimped on the printing cylinder 11 and thereby the revolving force of the pressure roller 12 of driven rotation transports to the contact site with printing cylinder 11, printing reverse side image by being crimped on the key plate 14 that gradation made a plate and on its another side.
First the paper P that has printed the reverse side image and become the paper that two-face printing finishes by the switching part 10 that has occupied primary importance to 6 guiding of row's paper portion, by its leading section being floated, peel off from the outer peripheral face of printing cylinder 11 by the front end of separation claw 31 then from the air-supply of peeling off fan 34.The paper P that prints that peels off transports afterwards to transport and be discharged to the arrow label orientation of Fig. 1 to row's paper delivery unit 32 and piles up on discharge tray 33.Carry out above-mentioned action repeatedly up to the printing number of finishing setting, then the action at each position stops when having arrived the printing number of setting, the printing release.
When carrying out above-mentioned printing action, also as described in " summary of the invention " hurdle, because different and produce concentration difference on the positive and negative at paper when the printing process of front and during the back face printing operation with time of contact of printing cylinder outer peripheral face.In order to prevent the generation of this unfavorable condition, heat 41 energy that apply of supplying with to the key plate 21 that should form the key plate 14 that gradation made a plate when making a plate, first plate-making picture are lower than when second plate-making picture is made a plate.The following describes this embodiment.
When setting various plate-making condition selector switch 30 is placed " OFF ", press then and apply energy settings key 29, on display unit 28, demonstrate when then this signal is sent in the control device 35 and apply energy settings key 29 and be pressed by the operator.Press plate-making beginning key 23 then, with above-mentioned same, the version action is discharged in 5 actions of row publishing department.
When discharging the version release, then proceed the plate-making action.This plate-making action timed unit 35 is reading first original image that portion 7 reads by image as first plate-making picture and make plate-making portion 3 actions that should make a plate, but at this moment send actuating signal from control device 35 thermotropism heads 41, the energy that applies that thermotropism head 41 is supplied with is controlled to predefined first and applies energy.
When making a plate, then make the action of heat 41 stop temporarily and on key plate 21, form the not plate-making part of specific length corresponding to first plate-making picture of first original image.Control device 35 is reading second original image that portion 7 reads by image as second plate-making picture and make plate-making portion 3 actions that should make a plate then.At this moment from control device 35 once more thermotropism head 41 send actuating signal, thermotropism head 41 supply with apply energy be controlled to than first apply energy high predefined second apply energy.
When making a plate corresponding to second plate-making picture of second original image, key plate 14 and above-mentioned similarly being wrapped on the printing cylinder 11 that the gradation of being made a plate has been made a plate, two-face printing device 1 finishes the plate-making action and becomes the printing holding state.Press printing beginning key 24 after having set various printing conditions by the operator then, then similarly print action, and when finishing the printing number of setting, make two-face printing device 1 stop action with above-mentioned.
According to said structure, by making the energy that thermotropism head 41 applies when first plate-making picture of printing cylinder 11 and paper P length time of contact is made a plate be lower than the energy that thermotropism head 41 applies when printing cylinder 11 is made a plate with second plate-making picture of paper P weak point time of contact, thereby make the perforation footpath of the perforation footpath of first plate-making picture less than second plate-making picture, in identical time of contact with by second plate-making picture, compare to the quantity of ink of the another side duplicating of paper P from printing cylinder 11, suppressed by first plate-making picture and from the quantity of ink of printing cylinder 11 to the face duplicating of paper P, the generation of the two sides concentration difference of paper P can be prevented like this, and the good two-face printing thing that positive and negative does not have concentration difference can be obtained.
In said structure, apply control of energy, can enumerate the method for being undertaken and offer the method that the printing power of heat 41 carries out by change by the electrical pulse that changes heat 41 as thermotropism head 41.Control the method that applies energy and can adopt for example No. 2915776 disclosed methods of communique of Japan's patent by changing electrical pulse, control the method that applies energy and for example can adopt that the spy of Japan opens the disclosed method of 2001-38942 communique by changing printing power.
In said structure, first applies energy and second applies energy and uses predefined value respectively, applies energy but also can set arbitrarily sometimes according to the difference of printing image.Be the image at center and as the back face printing image when printing has the image of solid image with literal and lines for example, if do not apply that energy settings becomes to second and first to apply energy identical or apply than first that energy is little then can be when the back face printing operation to be increased and produce concentration difference on the two sides of paper P from the printing ink transfer amount of printing cylinder 11 as the printing of front printing image.In this case, can set the structure that applies energy that thermotropism head 41 is supplied with in the time of also can being formed in the initial setting pattern when the printing process of front and during the back face printing operation respectively arbitrarily.
Puncture probability is by the being adjacent to property decision of heat head with key plate, and this being adjacent to property depends on the flatness of key plate.Key plate applying thermoplastic resin film and porous supporting mass and constitute, but well-known many by the situation that the mixture of synthetic fibers, natural fiber and synthetic fibers such as natural fibers such as Japan paper, PET constitutes, and use its flatness of key plate of the porous supporting mass that constitutes by synthetic fibers the highest as the general porous supporting mass that uses.In addition, comprise at the porous supporting mass and to have hygroscopic natural fiber for a long time, under hot environment because natural fiber moisture absorption and expand, and apply tension force at the thermoplastic resin film that is fitted on the porous supporting mass, improve the flatness of key plate, but its flatness reduction under low wet environment on the contrary.
Do not use this flatness high and during with the bad key plate of the being adjacent to property of heat head, bad by reducing perforation to the enough heats of key plate transmission in the past to guarantee puncture probability from the heat head.At this, in order just to need conduction time of lengthening thermotropism head to the enough heats of key plate transmission from heat head, the number of partitions when therefore considering to reduce the energising of thermotropism head and increase the heater number of heating when switching on each time.But increase the heater number of energising each time if so, then, might produce so-called common decline to the energy decreases that applies of whole heater supply.
The present invention is the energising cycle of the thermotropism head 41 that extends for the conduction time of the thermotropism head 41 that extends.The lengthening energising cycle is exactly the travelling speed by reduction key plate 21 specifically, promptly reduces the rotary speed of platen roller 40 and realizes.Can increase the slippage that thermotropism head 41 applies energy by the energising cycle of lengthening thermotropism head 41, promptly increase the reduction of electrical pulse width.The change in energising cycle is described with Fig. 4 below.
The longitudinal axis is represented puncture probability in curve map shown in Figure 4, and transverse axis represents to apply the slippage of energy; Puncture probability and the relation that applies the energy decreases amount when α of curve shown in the solid line represents that the porous supporting mass uses the key plate of 100% synthetic fibers, puncture probability and the relation that applies the energy decreases amount when curve β shown in the chain-dotted line represents that the porous supporting mass uses the key plate of 100% natural fiber, the β of curve shown in the dotted line 1 expression porous supporting mass are used 100% natural fiber key plate and the puncture probability when the energising cycle extend and apply the relation of energy decreases amount.In addition, heavy line in the curve map represents to be used to become the puncture probability desired value of the fixed value of the puncture probability that does not influence image, wherein A represents to guarantee the energy decreases scope that applies of the puncture probability desired value of the key plate represented with curve α, B represents to guarantee the energy decreases scope that applies of the puncture probability desired value of the key plate represented with curve β, B1 represent to guarantee the key plate represented with curve β 1 the puncture probability desired value apply the energy decreases weight range.
When the energy that thermotropism head 41 applied when the energy ratio that thermotropism head 41 applies when making a plate corresponding to first plate-making picture of the high direct picture of printing concentration was made a plate corresponding to second plate-making picture of reverse side image is low, when making a plate with second plate-making picture apply energy as the basis in the scope shown in A or the B, promptly apply energy in the scope inner control of (having surpassed the puncture probability desired value) that the printing image is not exerted an influence.
But during the key plate that use curve β represents, to compare its flatness bad because with the key plate that curve α represents, so can surpass the scope narrow (B is narrower than A) that the puncture probability desired value applies energy control, when image color is equated with the reverse side image, can not be controlled at fully sometimes in the scope (B scope) above the puncture probability desired value.At this moment puncture probability worsens, and might produce hollow on image.So by the lengthening energising cycle, curve β is promoted to curve β 1, the scope that surpasses puncture probability expands scope B1 to from scope B, so can print the control of concentration in the scope that does not influence image.
The following describes the action of controlling the two-face printing device 1 of energising during the cycle by the rotary speed control key plate travelling speed of control platen roller 40.
After when setting various plate-making condition selector switch 30 being placed " ON " by the operator, press plate-making beginning key 23, be considered as supressing automatically and apply energy settings key 29 and send signal to control device 35, show on display unit 28 that simultaneously applying energy settings key 29 has been pressed, arrange publishing department's 5 work then, discharge the version action.
Then proceed the plate-making action when discharging the version release.When carrying out this plate-making action, send actuating signal to platen roller 40 with hot 41 from control device 35, the travelling speed of the key plate 21 that is formed by platen roller 40 is changed over speed slow when common, and the energy of simultaneously thermotropism head 61 being supplied with that applies is controlled to the predefined the 3rd and applies energy.The 3rd applies energy can described relatively first applies the width that energy increases electrical pulse, and sets the scope above the puncture probability desired value for.
If the action that first plate-making picture of first original image correspondence is made a plate then hot 41 temporarily stops, on key plate 21, forming the part of not making a plate.Send actuating signal from control device 35 to platen roller 40 and heat 41 then, the travelling speed of the key plate 21 that is caused by platen roller 40 is changed over speed when common, the energy of simultaneously thermotropism head 41 being supplied with that applies is controlled to predefined second and prints energy.The key plate 14 that the gradation of being made a plate has been made a plate in second plate-making picture plate-making back is wrapped on the printing cylinder 11, and two-face printing device 1 becomes holding state.Press printing beginning key 24 after setting various printing conditions by the operator then, print action, then two-face printing device 1 quits work when finishing the printing number of setting.
Pass through said structure, in identical time of contact, make from the quantity of ink homogenising of printing cylinder 11, can prevent to produce concentration difference, prevent hollow generation simultaneously on the two sides of paper P to the two-face printing of paper P, reproduce good printing image, and can obtain good two-face printing thing.
Even the travelling speed of the key plate 21 that applies energy and caused by platen roller 40 that in this case, also can thermotropism head 41 is supplied with when setting pattern is in the early stage set arbitrarily respectively when the printing process of front and in the back face printing operation time.
Claims (9)
1, a kind of two-face printing device, it comprises: Printing Department, it has printing cylinder can freely contact the press device that is provided with described relatively printing cylinder with leaving; Plate-making portion, it has at the heat head of the enterprising eleven punch 11 of key plate plate-making and transports the platen roller of key plate, and the length direction along key plate had corresponding to first plate-making picture of direct picture with corresponding to the key plate that the gradation of second plate-making picture of reverse side image has been made a plate makes a plate; Paper feed part, its paper transports to described Printing Department; Row's paper portion, the paper discharge that it prints and finish printing in described Printing Department; Auxiliary tray, it leaves the paper that front that described Printing Department formed direct picture finishes printing in temporarily; Paper feeder again, it leaves the paper that the front on the described auxiliary tray finishes printing in delivers to described Printing Department again; Switching part, its paper that has passed through described Printing Department is to a certain side's channeling conduct of described auxiliary tray or described row's paper portion, the back face printing operation of this two-face printing device printing reverse side image on the another side that carries out behind the front printing process that is carried out at printing direct picture on the one side of described paper at described paper, it is characterized in that, it has control device, this control device control gives the energy that applies of described heat head, makes the energy that applies that gives described heat head for the plate-making of carrying out described first plate-making picture be lower than the energy that applies that gives described heat head for the plate-making of carrying out described second plate-making picture.
2, two-face printing device as claimed in claim 1 is characterized in that, described control device is controlled the described energy that applies by changing to the electrical pulse of described heat head.
3, two-face printing device as claimed in claim 1 is characterized in that, described control device is controlled the described energy that applies by the printing power that change offers described heat head.
4, two-face printing device as claimed in claim 2 is characterized in that, described control device is controlled the described energy that applies by the printing power that change offers described heat head.
5, as each described two-face printing device in the claim 1～4, it is characterized in that, drive the described platen roller of control, make the key plate travelling speed that when described first plate-making picture is made a plate, forms slower than the key plate travelling speed that when described second plate-making picture is made a plate, forms by described platen roller by described platen roller.
6, two-face printing device as claimed in claim 5 is characterized in that, it possesses switching device shifter, and this switching device shifter switches to the state of the key plate travelling speed of controlling described platen roller and do not control the state of the key plate travelling speed of described platen roller.
7, as each described two-face printing device in the claim 1～4, it is characterized in that, it possess when the printing process of front and when the back face printing operation from the outer peripheral face of described printing cylinder the air-supply arrangement of release papers.
8, two-face printing device as claimed in claim 6 is characterized in that, it possess when the printing process of front and when the back face printing operation from the outer peripheral face of described printing cylinder the air-supply arrangement of release papers.
9, two-face printing device as claimed in claim 5 is characterized in that, it possess when the printing process of front and when the back face printing operation from the outer peripheral face of described printing cylinder the air-supply arrangement of release papers.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP386894/2003 | 2003-11-17 | ||
| JP386894/03 | 2003-11-17 | ||
| JP2003386894A JP4469161B2 (en) | 2003-11-17 | 2003-11-17 | Duplex printing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1618620A CN1618620A (en) | 2005-05-25 |
| CN1328065C true CN1328065C (en) | 2007-07-25 |
Family
ID=34694451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100785963A Expired - Fee Related CN1328065C (en) | 2003-11-17 | 2004-09-15 | Two-face printing device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4469161B2 (en) |
| CN (1) | CN1328065C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5103646B2 (en) * | 2007-11-29 | 2012-12-19 | 東北リコー株式会社 | Paper peeling apparatus, paper peeling method, printing apparatus and printing method |
| JP5328390B2 (en) * | 2009-01-27 | 2013-10-30 | 理想科学工業株式会社 | Double-sided stencil printing machine |
| JP5222884B2 (en) * | 2010-04-19 | 2013-06-26 | 日立オムロンターミナルソリューションズ株式会社 | Optical character reader |
| CN109109439A (en) * | 2018-09-01 | 2019-01-01 | 赵忠祥 | A kind of plastic relief synergy UV technique and a kind of manufacturing method of packaging material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4793882A (en) * | 1985-11-08 | 1988-12-27 | Giulini Chemie Gmbh | Process for producing three-dimensional stiffening element of a meltable plastic powder or a powder mixture containing meltable plastic powder and application thereof to a substrate, particularly shoe parts |
| JPH08332768A (en) * | 1995-06-08 | 1996-12-17 | Tohoku Ricoh Co Ltd | Method and apparatus for stencil printing, master used therefor and engraving apparatus for engraving the same |
| JPH10226037A (en) * | 1997-02-17 | 1998-08-25 | Star Micronics Co Ltd | Plate-making apparatus |
| JP2003200645A (en) * | 2002-01-09 | 2003-07-15 | Tohoku Ricoh Co Ltd | Perfecting printing device |
| JP2003231338A (en) * | 2002-02-06 | 2003-08-19 | Riso Kagaku Corp | Perfecting stencil printing machine |
-
2003
- 2003-11-17 JP JP2003386894A patent/JP4469161B2/en not_active Expired - Fee Related
-
2004
- 2004-09-15 CN CNB2004100785963A patent/CN1328065C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4793882A (en) * | 1985-11-08 | 1988-12-27 | Giulini Chemie Gmbh | Process for producing three-dimensional stiffening element of a meltable plastic powder or a powder mixture containing meltable plastic powder and application thereof to a substrate, particularly shoe parts |
| JPH08332768A (en) * | 1995-06-08 | 1996-12-17 | Tohoku Ricoh Co Ltd | Method and apparatus for stencil printing, master used therefor and engraving apparatus for engraving the same |
| JPH10226037A (en) * | 1997-02-17 | 1998-08-25 | Star Micronics Co Ltd | Plate-making apparatus |
| JP2003200645A (en) * | 2002-01-09 | 2003-07-15 | Tohoku Ricoh Co Ltd | Perfecting printing device |
| JP2003231338A (en) * | 2002-02-06 | 2003-08-19 | Riso Kagaku Corp | Perfecting stencil printing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005144897A (en) | 2005-06-09 |
| JP4469161B2 (en) | 2010-05-26 |
| CN1618620A (en) | 2005-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4976197A (en) | Reverse side printing device employing sheet feed cylinder in sheet-fed printer | |
| CN1328065C (en) | Two-face printing device | |
| JP2007331159A (en) | Printing equipment | |
| JP5076144B2 (en) | Stencil printing machine | |
| JP2008179456A (en) | Screen printing device | |
| JP3545861B2 (en) | Stencil printing machine | |
| JP3701836B2 (en) | Printing device | |
| JP2004137048A (en) | Printing device | |
| JP3311541B2 (en) | Stencil printing method and stencil printing apparatus | |
| JP3553226B2 (en) | Double-sided printing device | |
| CN101519004B (en) | Stencil printing apparatus | |
| JP2005219346A (en) | Perfecting printing device | |
| JP3441023B2 (en) | Multicolor printing method and multicolor printing apparatus using the same | |
| JPH11157197A (en) | Rotary mimeograph printer | |
| JP2005342946A (en) | Stencil process printing device | |
| JP4254985B2 (en) | Paper feeder | |
| JP3558707B2 (en) | Plate making printing method and plate making printing apparatus using the same | |
| JP2005144898A (en) | Perfecting printing equipment | |
| JP5034048B2 (en) | Stencil printing machine | |
| JP2005153175A (en) | Stencil printing equipment | |
| JP2005231136A (en) | Flexographic printing machine | |
| JP2859683B2 (en) | Printing method by copy machine | |
| JP3545856B2 (en) | Stencil printing machine | |
| JP2005125624A (en) | Double-side printing apparatus | |
| JPH06312569A (en) | Screen printing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: RICOH CO. LTD. Free format text: FORMER OWNER: TOHOKU RICOH CO., LTD. Effective date: 20130523 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130523 Address after: Tokyo, Japan, Japan Patentee after: Ricoh Co., Ltd. Address before: Miyagi Prefecture in Japan Patentee before: Tohoku Ricoh Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070725 Termination date: 20160915 |