CA1129248A - Ink feeding device of a roller-type inking unit for rotary printing presses - Google Patents
Ink feeding device of a roller-type inking unit for rotary printing pressesInfo
- Publication number
- CA1129248A CA1129248A CA354,905A CA354905A CA1129248A CA 1129248 A CA1129248 A CA 1129248A CA 354905 A CA354905 A CA 354905A CA 1129248 A CA1129248 A CA 1129248A
- Authority
- CA
- Canada
- Prior art keywords
- roller
- inking unit
- transfer roller
- duct
- transfer
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/02—Ducts, containers, supply or metering devices
- B41F31/14—Applications of messenger or other moving transfer rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F31/00—Inking arrangements or devices
- B41F31/26—Construction of inking rollers
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to an ink feeding device for the ink-roll mechanism of a rotary printing machine with a duct-roller and a transfer roller cooperating not only with the duct roller but also with one of the inking unit rollers. The transfer roller is mounted upon its control shaft with play over its entire length. The surface of the transfer roller is of closed design. The body of the transfer roller is designed to flex at right angles to its axis of rotation. Means are provided to ensure that the transfer roller is pressed over its entire length snugly against both the duct roller and the inking unit roller.
These means may be dispensed with if the weight of the transfer roller ensures that the surface thereof is pressed snugly against the two adjacent rollers. Extremely thin films of ink can be transferred continuously since by reason of its resiliency and its special mounting, the transfer roller is fully adapted to the shape of the surfaces of the two adjacent rollers.
The invention relates to an ink feeding device for the ink-roll mechanism of a rotary printing machine with a duct-roller and a transfer roller cooperating not only with the duct roller but also with one of the inking unit rollers. The transfer roller is mounted upon its control shaft with play over its entire length. The surface of the transfer roller is of closed design. The body of the transfer roller is designed to flex at right angles to its axis of rotation. Means are provided to ensure that the transfer roller is pressed over its entire length snugly against both the duct roller and the inking unit roller.
These means may be dispensed with if the weight of the transfer roller ensures that the surface thereof is pressed snugly against the two adjacent rollers. Extremely thin films of ink can be transferred continuously since by reason of its resiliency and its special mounting, the transfer roller is fully adapted to the shape of the surfaces of the two adjacent rollers.
Description
1 rl`he invention concerlls an ink feeding device of a roller-type inkin~ unit for rotary printing presses with a duct roller and a transfer roller, the latter working together, apart from with the duct roller, also with one of the inking unit rollers.
Known designs are, for example, ink feeding devices in which either an ink vibrator or a film roller works together with the duct roller. Vibrator inking units can produce only a discontinuous ink feed. The ink transfer by means of an ink vibrator is not precisely uniform either in the circum-ferential direction or over the machine width.
Although, when using high-precision rollers and bearings, overshot inking units permit uniform ink transfer, they call for extreme outlay in terms of the rigidity of the components and the high-quality of the bearings for the rollers. As a rule, with these overshot inking units, the location of the differential speed is between the duct roller and the transfer roller working together with it. Yet precisely the duct roller, due to the action of the ink adjusting unit (ink knife), is one of those rollers which have relatively poor trueness of running or are badly affected by sagging, which impairs uniform ink acceptance. The transfer of small quantities of ink and the return of the ink in areas requiring little ink is inadequate in the known inking units. A decisive disadvantage of conventional overshot inking units is also their sensitivity to temperature. As the temperature rises, differences in the thermal expansion of components lead to deficiencies in ink transfer.
The object of the invention is to create an ink feeding device in which concentricity error and positional error of the liZ924f~
ICt roller, of the transfer roller and of the next inking unit roller driven at press speed, as well as influences of temperature cannot have any detrimental effect on the quality of ink transfer.
This is achieved by the invention in that the flexibility of the roller body of the transfer roller perpendicular to its axis of rotation is such that the transfer roller adapts automatically to the shape of the jackets of the neighbouring rollers and is in snug contact over its entire length both with the duct roller as well as with the inking unit roller.
The transfer roller according to the invention dispenses with elaborate bearing and switching elements. Extremely thin ink films can be transferred continuously because, due to its flexibility, the transfer roller adapts fully to the shape of the jackets of both neighbouring rollers. Ink transfer is insensitive to any influences of ink knife settings and roller sag resulting therefrom. Even with a thin ink film the ink is returned. Influences of temperature are eliminated. It is particularly advantageous to arrange the duct roller and the first inking unit roller in such a way that, due to its own dead weight, the transfer roller is self-centering and moulds itself jointlessly, without air gap both to the duct roller as well as to the inking unit roller.
The invention is described below in greater detail on the basis of several specimen embodiments represented in the drawings.
Figure 1 - 4 show various embodiments of the roller body of a transfer roller according to the invention;
Figure 5 shows an arrangement of pressure rollers;
Figures 6 - 8 show different arrangements of the rollers
Known designs are, for example, ink feeding devices in which either an ink vibrator or a film roller works together with the duct roller. Vibrator inking units can produce only a discontinuous ink feed. The ink transfer by means of an ink vibrator is not precisely uniform either in the circum-ferential direction or over the machine width.
Although, when using high-precision rollers and bearings, overshot inking units permit uniform ink transfer, they call for extreme outlay in terms of the rigidity of the components and the high-quality of the bearings for the rollers. As a rule, with these overshot inking units, the location of the differential speed is between the duct roller and the transfer roller working together with it. Yet precisely the duct roller, due to the action of the ink adjusting unit (ink knife), is one of those rollers which have relatively poor trueness of running or are badly affected by sagging, which impairs uniform ink acceptance. The transfer of small quantities of ink and the return of the ink in areas requiring little ink is inadequate in the known inking units. A decisive disadvantage of conventional overshot inking units is also their sensitivity to temperature. As the temperature rises, differences in the thermal expansion of components lead to deficiencies in ink transfer.
The object of the invention is to create an ink feeding device in which concentricity error and positional error of the liZ924f~
ICt roller, of the transfer roller and of the next inking unit roller driven at press speed, as well as influences of temperature cannot have any detrimental effect on the quality of ink transfer.
This is achieved by the invention in that the flexibility of the roller body of the transfer roller perpendicular to its axis of rotation is such that the transfer roller adapts automatically to the shape of the jackets of the neighbouring rollers and is in snug contact over its entire length both with the duct roller as well as with the inking unit roller.
The transfer roller according to the invention dispenses with elaborate bearing and switching elements. Extremely thin ink films can be transferred continuously because, due to its flexibility, the transfer roller adapts fully to the shape of the jackets of both neighbouring rollers. Ink transfer is insensitive to any influences of ink knife settings and roller sag resulting therefrom. Even with a thin ink film the ink is returned. Influences of temperature are eliminated. It is particularly advantageous to arrange the duct roller and the first inking unit roller in such a way that, due to its own dead weight, the transfer roller is self-centering and moulds itself jointlessly, without air gap both to the duct roller as well as to the inking unit roller.
The invention is described below in greater detail on the basis of several specimen embodiments represented in the drawings.
Figure 1 - 4 show various embodiments of the roller body of a transfer roller according to the invention;
Figure 5 shows an arrangement of pressure rollers;
Figures 6 - 8 show different arrangements of the rollers
2 --112924~
1 an iilk ~eedillg device according to the invention.
Figure 1 shows a transfer roller according to the invention, the roller body 1 of which consists of a row of coaxial rollers 2 of equal size, of which each exhibits a rigid core 3 with an elastomeric jacket 4.
The rollers 2 are mounted on a selector shaft 5 with considerable play 6. They can therefore be displaced in relation to each other in the radial direction. In the lateral direction the rollers 2 forming the roller body 1 are held together by a washer 7 and a circlip 8. The selector shaft 5 on which the rollers 2 are lined up does not therefore have any real support function. It is merely used to engage or disengage the transfer roller 28 (see Figure 6) from the duct roller 26 and the inking unit roller 27 or 33. The selector shaft 5 does not exert any contact pressure. On the contrary, the individual rollers 2 of the roller body 1 can adjust automatically into their radial position. Due to this flexibility of the roller body 1 consisting of a series of individual elements, namely the rollers 2, the transfer roller 28 comes into snug contact with the jackets 29 and 30 of the neighbouring rollers, even when, for example, the duct roller 26 exhibits considerable sag due to heavy local contact of the ink knife.
As is shown in Figure 2, the rollers 2 lined up on the selector shaft 5 may also be whole. In order to prevent soiling of the end ~aces of the individual rollers and thus a sticking together of the rollers, the rollers 2 forming the flexible roller body 1 are covered with a hose 9 made of, for example, a rubber material. In this case too, the rollers 2 are mounted on the selector shaft 5 with considerable play 6 and the entire roller body 1 consisting of individual elements is ll;~gz4~
1 ~uided a~ its ends in the axial direction by the washers 7 and the circlips 8. The rollers 2 may, for example, have the width of an inking zone. Due to the radial displaceability of the rollers 2 in relation to one another and due to the elasticity of the hose 9, the roller body 1 has such flexibility in the radial direction that this transfer roller moulds itself joint-lessly, i.e. without air gap, to the shape of the neighbouring rollers. Defects of form and positional errors in any of the rollers working together cannot have a detrimental effect on the quality of the ink film transferred.
In the embodiment shown in Figure 3, the roller body 1 of the transfer roller according to the invention consists of a series of tubular rigid cores 10 lined up side by side which are covered with a jacket 11 - for example a rubber material -and are thus united to form the roller body 1. Between the end faces of the individual tubular cores 10 there is slight play 12 so that the entire roller body 1 has sufficient flexibility in the radial direction. With this embodiment too, there is a selector shaft 5 which, at either end, exhibits a rolling bearing 13, the outer race cf which supports a bushing 14 of the roller body 1 whenever the transfer roller is engaged or disengaged according to Figure 3. Guidance in the axial direction is again by means of the washers 7 in conjunction with the circlips 8.
On their insides, the individual cores 10 have con-siderable play 6 with respect to the selector shaft 5. The flexibility of the transfer roller according to Figure 3 is such that, if it were supported by its ends, it would have a sag of a few millimetres in its centre region. The region body 1 thus has the capability of coming into snug contact ll;~9Z4~
1 ~vith the jackets of two slightly deformed neighbouring rollers.
~ rhe transfer roller according to Figure 4 differs from the above-described one in that it has no rigid core elements.
In this case, the roller body 1 consists of an elastic, one-piece tubular core 15l made for example of hard rubber or rigid polyurethane, and a covering 16 surrounding it. The covering 16 corresponds to the coverings of customary ink rollersl but may possibly exhibit a higher Shore hardness.
The mounting of the double-layer elastic roller body 1 on the selector shaft 5 corresponds to that in Figure 3. Here tool there are rolling bearings 13, bushings 14 as well as washers 7 and circlips 8 for lateral guidance. There is con-siderably play 6 between the elastic roller body 1 and the support components as well as the selector shaft 5 itself so that the transfer roller 28 has sufficient room to adapt to any deformations or out-of-trueness in the jackets of the neighbouring rollers. In this case too, the elasticity of the roller body 1 is such that, if it were supported exclusively by its ends, it would sag in the middle by a few millimetres due to its own dead weight.
Figure 5 shows more or less the same embodiment of a transfer roller as in Figure 4. The only difference is that it additionally shows sprung pressure rollers 17 which, under the pressure of a helical spring 18, are in contact with the jacket of the roller body 1. They are arranged coaxially with respect to one another and are each mounted on brackets 19 where they can rotate. The brackets 19 are in their turn provided with guide pins 20 which project through guide holes 21 in a cross-beam 22. The helical springs 18 pushed onto each guide pin 20 are supported between the bracket 19 and the :~1292~Y
1 lnside wall 23 of the cross-beam 22. The cross-beam 22 is of swing-down design. Furthermore, it can be adjusted in such a way that the contact pressure of the pressure rollers 17 is varied. The upper free end of each pin 20 is provided with a circlip 2~ so that, when the cross-beam 22 is disengaged, the helical springs 18 do not force the guide pins 20 out of the guide holes 21. The pressure rollers 17 may exhibit the width of an inking zone, but they may also be wider in design. Their contact pressure is such that, due to the flexibility of its roller body 1, the transfer roller comes into jointless, i.e.
gap-free, contact with both neighbouring rollers, i.e. both the duct roller 26 as well as the first inking unit roller 27 or 33.
Figure 6 shows a possible roller arrangement of an ink feeding device according to the invention. The duct roller 26 mounted in the ink duct 25 and the first inking unit roller, for example the distributor 27, are approximately at the same height. The transfer roller 28 is placed loosely on the jacket 29 of the duct roller 26 and on the jacket 30 of the distributor 27 by the selector shaft 5.
The distributor 27 rotates at press speed while the duct roller 26 is driven at considerably lower speed. Since the contact gap 31 between the transfer roller 28 and the dis-tributor 27 has a lower position than the contact gap 32 between the transfer roller 28 and the duct roller 26, the transfer roller 28 is, due to its own dead weight and the above-mentioned vertical arrangement, in heavier contact with the distributor 27, which means that it is driven to a greater extent by the distributor 27 and thus its speed is closer to that of the distributor 27 than to that of the more slowly llZ5 2~8 1 ~tatLnc~ duct roller 26. Tllls higher circumferentia] speed of the transfer roller 28 in relation to the duct roller 26 means that the ink is not broken up by the rolling of the rollers against each other, but is contlnuously skimmed off and trans-ferred. The fact that there is a continuous transfer over the entire length of the transfer roller even in the case of extremely thin ink films is due above all - supported by the above-mentioned skimming effect - to the flexibility of the roller body of the transfer roller 28. With the roller arrange-ment shown, the dead weight of the transfer roller 28 is sufficient to obtain a snug, i.e. jointless, contact between the roller jackets at both contact gaps 31 and 32.
Figure 7 shows another roller arrangement. In this case, the duct roller 26 mounted in the ink duct 25 is consider-ably higher than the first inking unit roller 33 which, in this case, is not a distributor, the distributor 27 being the next roller of the inking unit. So that, due to its flexibility, the transfer roller 28 moulds itself snugly to the jackets of the two neighbouring rollers 26 and 33, there are two rows of pressure rollers 17 in the form as shown in Figure 5. The upper pressure rollers 17 are opposite the inking unit roller 33 and the lower pressure rollers 17 are opposite the duct roller 26. By moving the upper pressure rollers 17 in direction A, the transfer roller is brought into heavier contact with the inking unit roller 33, and by appropriately moving the lower pressure rollers 17 in direction B, it is brought into heavier contact with the duct roller 26. As a rule, however, the contact pressure between the transfer roller 28 and the first inking unit roller 33 will be set higher than between the transfer roller 28 and the duct roller 26, so that llZ924~
1 le circumferential speecl of the transfer roller 28 ls closer to that of the distributors rotating at press speed.
The roller arrangement shown in Figure 8 corresponds to that in Figure 7. Here too, the transfer roller 28 is in contact with a very high duct roller 26 and with a considerably lower inking unit roller 33 which, in its turn, works together with the first distributor 27 of the inking unit. The transfer roller 28 is pressed against the two neighbouriny rollers 26 and 33 by a single row of pressure rollers 17, the contact pressure of which in direction C is variable. In addition, the pressure rollers 17 can be swivelled about the axis of rotation of the transfer roller 28 by the angle ~, with the result that the direction of pressure C is varied depending on the angle c~
In this way, it is possible to adjust the rotational speed of the transfer roller 28. Depending on the size of the angle ~
the transfer roller 28 is driven either more by the inking unit roller 33 rotating at press speed or more by the considerably more slowly driven duct roller 26. The pressure roller 17 must only be swivelled to such an extent that it is ensured that the flexible roller body 1 of the transfer roller 28 is in jointless contact both with the jacket 29 of the duct roller 26 as well as with the jacket 34 of the first inking unit roller 33 over the entire length of the rollers.
The invention is not limited to the embodiments presented.
For example, it might also be modified in such a way that the transfer roller 28 is not only driven by friction, but also by its own drive. In this case, it must merely be ensured that, despite its separate drive, the transfer roller can come into snug contact due to its flexibility with the jackets of the neighbouring rollers. Moreover, it is also possible to li~924~
1 ,e transfer rollers 28 of the type shown in Figures 1 to 3 for the roller arrangements shown in Figures 7 and 8.
The idea of the invention can also be realized to great advantage if the transfer roller 28 consis-ts of at least two tubular, rigid roller cores joined together by an elastomeric jacket, or if the transfer roller 28 is formed by a single elastic jacket. For the last-mentioned embodiment, a rigid core can be dispensed with.
g _
1 an iilk ~eedillg device according to the invention.
Figure 1 shows a transfer roller according to the invention, the roller body 1 of which consists of a row of coaxial rollers 2 of equal size, of which each exhibits a rigid core 3 with an elastomeric jacket 4.
The rollers 2 are mounted on a selector shaft 5 with considerable play 6. They can therefore be displaced in relation to each other in the radial direction. In the lateral direction the rollers 2 forming the roller body 1 are held together by a washer 7 and a circlip 8. The selector shaft 5 on which the rollers 2 are lined up does not therefore have any real support function. It is merely used to engage or disengage the transfer roller 28 (see Figure 6) from the duct roller 26 and the inking unit roller 27 or 33. The selector shaft 5 does not exert any contact pressure. On the contrary, the individual rollers 2 of the roller body 1 can adjust automatically into their radial position. Due to this flexibility of the roller body 1 consisting of a series of individual elements, namely the rollers 2, the transfer roller 28 comes into snug contact with the jackets 29 and 30 of the neighbouring rollers, even when, for example, the duct roller 26 exhibits considerable sag due to heavy local contact of the ink knife.
As is shown in Figure 2, the rollers 2 lined up on the selector shaft 5 may also be whole. In order to prevent soiling of the end ~aces of the individual rollers and thus a sticking together of the rollers, the rollers 2 forming the flexible roller body 1 are covered with a hose 9 made of, for example, a rubber material. In this case too, the rollers 2 are mounted on the selector shaft 5 with considerable play 6 and the entire roller body 1 consisting of individual elements is ll;~gz4~
1 ~uided a~ its ends in the axial direction by the washers 7 and the circlips 8. The rollers 2 may, for example, have the width of an inking zone. Due to the radial displaceability of the rollers 2 in relation to one another and due to the elasticity of the hose 9, the roller body 1 has such flexibility in the radial direction that this transfer roller moulds itself joint-lessly, i.e. without air gap, to the shape of the neighbouring rollers. Defects of form and positional errors in any of the rollers working together cannot have a detrimental effect on the quality of the ink film transferred.
In the embodiment shown in Figure 3, the roller body 1 of the transfer roller according to the invention consists of a series of tubular rigid cores 10 lined up side by side which are covered with a jacket 11 - for example a rubber material -and are thus united to form the roller body 1. Between the end faces of the individual tubular cores 10 there is slight play 12 so that the entire roller body 1 has sufficient flexibility in the radial direction. With this embodiment too, there is a selector shaft 5 which, at either end, exhibits a rolling bearing 13, the outer race cf which supports a bushing 14 of the roller body 1 whenever the transfer roller is engaged or disengaged according to Figure 3. Guidance in the axial direction is again by means of the washers 7 in conjunction with the circlips 8.
On their insides, the individual cores 10 have con-siderable play 6 with respect to the selector shaft 5. The flexibility of the transfer roller according to Figure 3 is such that, if it were supported by its ends, it would have a sag of a few millimetres in its centre region. The region body 1 thus has the capability of coming into snug contact ll;~9Z4~
1 ~vith the jackets of two slightly deformed neighbouring rollers.
~ rhe transfer roller according to Figure 4 differs from the above-described one in that it has no rigid core elements.
In this case, the roller body 1 consists of an elastic, one-piece tubular core 15l made for example of hard rubber or rigid polyurethane, and a covering 16 surrounding it. The covering 16 corresponds to the coverings of customary ink rollersl but may possibly exhibit a higher Shore hardness.
The mounting of the double-layer elastic roller body 1 on the selector shaft 5 corresponds to that in Figure 3. Here tool there are rolling bearings 13, bushings 14 as well as washers 7 and circlips 8 for lateral guidance. There is con-siderably play 6 between the elastic roller body 1 and the support components as well as the selector shaft 5 itself so that the transfer roller 28 has sufficient room to adapt to any deformations or out-of-trueness in the jackets of the neighbouring rollers. In this case too, the elasticity of the roller body 1 is such that, if it were supported exclusively by its ends, it would sag in the middle by a few millimetres due to its own dead weight.
Figure 5 shows more or less the same embodiment of a transfer roller as in Figure 4. The only difference is that it additionally shows sprung pressure rollers 17 which, under the pressure of a helical spring 18, are in contact with the jacket of the roller body 1. They are arranged coaxially with respect to one another and are each mounted on brackets 19 where they can rotate. The brackets 19 are in their turn provided with guide pins 20 which project through guide holes 21 in a cross-beam 22. The helical springs 18 pushed onto each guide pin 20 are supported between the bracket 19 and the :~1292~Y
1 lnside wall 23 of the cross-beam 22. The cross-beam 22 is of swing-down design. Furthermore, it can be adjusted in such a way that the contact pressure of the pressure rollers 17 is varied. The upper free end of each pin 20 is provided with a circlip 2~ so that, when the cross-beam 22 is disengaged, the helical springs 18 do not force the guide pins 20 out of the guide holes 21. The pressure rollers 17 may exhibit the width of an inking zone, but they may also be wider in design. Their contact pressure is such that, due to the flexibility of its roller body 1, the transfer roller comes into jointless, i.e.
gap-free, contact with both neighbouring rollers, i.e. both the duct roller 26 as well as the first inking unit roller 27 or 33.
Figure 6 shows a possible roller arrangement of an ink feeding device according to the invention. The duct roller 26 mounted in the ink duct 25 and the first inking unit roller, for example the distributor 27, are approximately at the same height. The transfer roller 28 is placed loosely on the jacket 29 of the duct roller 26 and on the jacket 30 of the distributor 27 by the selector shaft 5.
The distributor 27 rotates at press speed while the duct roller 26 is driven at considerably lower speed. Since the contact gap 31 between the transfer roller 28 and the dis-tributor 27 has a lower position than the contact gap 32 between the transfer roller 28 and the duct roller 26, the transfer roller 28 is, due to its own dead weight and the above-mentioned vertical arrangement, in heavier contact with the distributor 27, which means that it is driven to a greater extent by the distributor 27 and thus its speed is closer to that of the distributor 27 than to that of the more slowly llZ5 2~8 1 ~tatLnc~ duct roller 26. Tllls higher circumferentia] speed of the transfer roller 28 in relation to the duct roller 26 means that the ink is not broken up by the rolling of the rollers against each other, but is contlnuously skimmed off and trans-ferred. The fact that there is a continuous transfer over the entire length of the transfer roller even in the case of extremely thin ink films is due above all - supported by the above-mentioned skimming effect - to the flexibility of the roller body of the transfer roller 28. With the roller arrange-ment shown, the dead weight of the transfer roller 28 is sufficient to obtain a snug, i.e. jointless, contact between the roller jackets at both contact gaps 31 and 32.
Figure 7 shows another roller arrangement. In this case, the duct roller 26 mounted in the ink duct 25 is consider-ably higher than the first inking unit roller 33 which, in this case, is not a distributor, the distributor 27 being the next roller of the inking unit. So that, due to its flexibility, the transfer roller 28 moulds itself snugly to the jackets of the two neighbouring rollers 26 and 33, there are two rows of pressure rollers 17 in the form as shown in Figure 5. The upper pressure rollers 17 are opposite the inking unit roller 33 and the lower pressure rollers 17 are opposite the duct roller 26. By moving the upper pressure rollers 17 in direction A, the transfer roller is brought into heavier contact with the inking unit roller 33, and by appropriately moving the lower pressure rollers 17 in direction B, it is brought into heavier contact with the duct roller 26. As a rule, however, the contact pressure between the transfer roller 28 and the first inking unit roller 33 will be set higher than between the transfer roller 28 and the duct roller 26, so that llZ924~
1 le circumferential speecl of the transfer roller 28 ls closer to that of the distributors rotating at press speed.
The roller arrangement shown in Figure 8 corresponds to that in Figure 7. Here too, the transfer roller 28 is in contact with a very high duct roller 26 and with a considerably lower inking unit roller 33 which, in its turn, works together with the first distributor 27 of the inking unit. The transfer roller 28 is pressed against the two neighbouriny rollers 26 and 33 by a single row of pressure rollers 17, the contact pressure of which in direction C is variable. In addition, the pressure rollers 17 can be swivelled about the axis of rotation of the transfer roller 28 by the angle ~, with the result that the direction of pressure C is varied depending on the angle c~
In this way, it is possible to adjust the rotational speed of the transfer roller 28. Depending on the size of the angle ~
the transfer roller 28 is driven either more by the inking unit roller 33 rotating at press speed or more by the considerably more slowly driven duct roller 26. The pressure roller 17 must only be swivelled to such an extent that it is ensured that the flexible roller body 1 of the transfer roller 28 is in jointless contact both with the jacket 29 of the duct roller 26 as well as with the jacket 34 of the first inking unit roller 33 over the entire length of the rollers.
The invention is not limited to the embodiments presented.
For example, it might also be modified in such a way that the transfer roller 28 is not only driven by friction, but also by its own drive. In this case, it must merely be ensured that, despite its separate drive, the transfer roller can come into snug contact due to its flexibility with the jackets of the neighbouring rollers. Moreover, it is also possible to li~924~
1 ,e transfer rollers 28 of the type shown in Figures 1 to 3 for the roller arrangements shown in Figures 7 and 8.
The idea of the invention can also be realized to great advantage if the transfer roller 28 consis-ts of at least two tubular, rigid roller cores joined together by an elastomeric jacket, or if the transfer roller 28 is formed by a single elastic jacket. For the last-mentioned embodiment, a rigid core can be dispensed with.
g _
Claims (10)
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE PROPERTY
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In an inking unit for a rotary printing press an ink feeding device comprising a duct roller, a transfer roller and an inking unit roller, said transfer roller positioned between said duct roller and said inking roller for the transfer of ink, said transfer roller comprising a roller body, and mounting means for supporting said body in a manner to provide considerable radial play of said roller body relative to said mounting means whereby said body is yieldable in a direction perpendicular to the length of the roller such that said transfer roller is in snug pressing contact over its entire length with said duct roller and said inking unit roller.
2. In a rotary printing press an ink feed device comprising a duct roller, a transfer roller, and an inking unit roller, said transfer roller cooperating with said duct roller and said inking unit roller such that said transfer roller is pressable against the duct roller, said transfer roller having a roller body mounted on a shaft with play over the entire length of said roller body, said roller body having a plurality of individual parts which are yieldable in a direction perpendicular to the axis of rotation of said transfer roller whereby said transfer roller is in a snug pressing contact over its entire length with both the duct roller and the inking unit roller on grounds of its dead weight.
3. In an inking unit according to Claim 1, wherein the transfer roller is pressed against the duct roller and the inking unit roller over its entire length by two rows of sprung pressure rollers.
4. In an inking unit according to Claim 1, wherein the transfer roller is pressed against the duct roller and the inking unit roller over its entire length by two rows of sprung pressure rollers whereby the contact pressure of the pressure rollers is variable.
5. In an inking unit according to Claim 1, 2 or 4, wherein said roller body consists of a row of coaxial rollers of equal size of which each exhibits a rigid core with an elastomeric jacket.
6. In an inking unit according to Claim 1, 2 or 4, wherein the roller body consists of a row of coaxial rollers of equal size which are covered by an elastic hose.
7. In an inking unit according to Claim 1, 2 or 4, wherein the transfer roller consists of a series of tubular cores which are joined together by a jacket of an elastic material.
8. In an inking unit according to Claim 1, 2 or 4, wherein said roller body consists of at least two tubular, rigid roller cores joined together by an elastomeric jacket.
9. In an inking unit according to Claim 1, 2 or 4, wherein the roller body is formed of an elastic core with an elastic covering.
10. In an inking unit according to claim 1, 2 or 4, wherein the transfer roller is formed of a single elastic jacket.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2930303.5 | 1979-07-26 | ||
| DE2930303A DE2930303C2 (en) | 1979-07-26 | 1979-07-26 | Film inking unit for rotary printing machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1129248A true CA1129248A (en) | 1982-08-10 |
Family
ID=6076820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA354,905A Expired CA1129248A (en) | 1979-07-26 | 1980-06-26 | Ink feeding device of a roller-type inking unit for rotary printing presses |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0023251A1 (en) |
| JP (1) | JPS5625457A (en) |
| AR (1) | AR227394A1 (en) |
| AU (1) | AU5926680A (en) |
| BR (1) | BR8004688A (en) |
| CA (1) | CA1129248A (en) |
| DE (1) | DE2930303C2 (en) |
| DK (1) | DK284180A (en) |
| ES (1) | ES8104948A1 (en) |
| IT (1) | IT8053430V0 (en) |
| MX (1) | MX153040A (en) |
| NO (1) | NO802260L (en) |
| ZA (1) | ZA804339B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3117341C2 (en) * | 1981-05-02 | 1988-07-07 | Albert-Frankenthal Ag, 6710 Frankenthal | Inking unit |
| DE3119789C2 (en) * | 1981-05-19 | 1984-05-30 | Albert-Frankenthal Ag, 6710 Frankenthal | Short inking unit |
| JPS58210613A (en) * | 1982-06-02 | 1983-12-07 | Hitachi Ltd | Quartz tube for heat treatment furnace |
| JPH02218118A (en) * | 1989-02-17 | 1990-08-30 | Nec Corp | Impurity diffusion apparatus |
| DE10106528A1 (en) | 2000-03-10 | 2001-09-13 | Heidelberger Druckmasch Ag | Mounting for a roller body at a rotary printing press has a rotating body with free rotation at the roller support structure as the roller axis with a friction torque transmission to the slower body on a rotary speed deviation |
| JP2008126508A (en) * | 2006-11-20 | 2008-06-05 | Mitsubishi Heavy Ind Ltd | Roll supporting structure of printing machine and printing machine |
| CN108909180B (en) * | 2018-06-28 | 2023-10-17 | 河南宝钢制罐有限公司 | Ink transfer dividing roller test system and method for ink unit of metal can printer |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE44857C (en) * | F. MÜLLER in Potschappel b. Dresden | Elastic inking roller for wallpaper printing machines | ||
| DE277903C (en) * | ||||
| DE604179C (en) * | 1934-10-16 | Cie Francaise Du Caoutchouc | Roller with a flexible covering, especially for wool washing machines, wringing machines and printing machines | |
| DE563555C (en) * | 1932-11-08 | Fallert & Co Akt Ges | Inking unit, especially for letterpress machines | |
| DE106921C (en) * | 1898-09-21 | 1899-12-14 | ||
| GB244581A (en) * | 1924-12-11 | 1925-12-24 | William Strachan | Improvements in or relating to the construction of damping and inking rollers for printing machines |
| GB264678A (en) * | 1926-02-22 | 1927-01-27 | Max Kroenert | Improvements in or relating to the color or ink transmitting or applying rollers of rotary printing machines |
| DE543983C (en) * | 1929-05-08 | 1932-02-12 | Claybourn Process Corp | Device for supplying paint, in particular bronze paint, to printing machines |
| DE607990C (en) * | 1934-06-16 | 1935-01-12 | Maschf Augsburg Nuernberg Ag | Lifterless inking unit for printing machines |
| US2114378A (en) * | 1936-11-30 | 1938-04-19 | Oxford Varnish Corp | Printing roll |
| GB544480A (en) * | 1940-08-07 | 1942-04-15 | American Bank Note Co | Inking mechanisms for rotary steel plate printing machines |
| DE883288C (en) * | 1941-09-27 | 1953-07-16 | Carl Ejner Larsen | Dampening system for offset printing machines |
| DE901057C (en) * | 1950-04-14 | 1954-01-07 | Koenig & Bauer Schnellpressfab | Lifterless inking unit for rotary printing machines |
| FR1021637A (en) * | 1950-07-07 | 1953-02-20 | Stuart Murray Ltd | Improvement of rollers intended for inking devices of printing machines |
| DE1236528B (en) * | 1960-07-12 | 1967-03-16 | Miller Printing Machinery Co | Dampening system for rotary flat printing machines |
| FR1367497A (en) * | 1962-09-03 | 1964-07-24 | Karlstad Mekaniska Ab | Advanced paper calender |
| US3475803A (en) * | 1965-08-27 | 1969-11-04 | Edward D Hill | Roller for applying paint,ink and the like |
| DE1812047A1 (en) * | 1968-11-30 | 1970-06-25 | Karl Raes | Inking unit for dry offset machines |
| US3991669A (en) * | 1973-01-17 | 1976-11-16 | Imperial Chemical Industries Limited | Calender presses |
| DD105770A1 (en) * | 1973-09-27 | 1974-05-12 | ||
| CH598009A5 (en) * | 1976-12-16 | 1978-04-28 | Jaeggi Jean Pierre | Resilient moistener roll for rotary print machine |
| DE2659557A1 (en) * | 1976-12-30 | 1978-07-06 | Maschf Augsburg Nuernberg Ag | ROTARY OFFSET PRINTER |
| DE7804506U1 (en) * | 1978-02-15 | 1978-06-01 | Agellice Gmbh, 7407 Rottenburg | BRUSH ROLLER ASSEMBLED FROM LINKED RING-SHAPED SECTIONS |
-
1979
- 1979-07-26 DE DE2930303A patent/DE2930303C2/en not_active Expired
-
1980
- 1980-06-02 EP EP80103057A patent/EP0023251A1/en not_active Withdrawn
- 1980-06-12 AU AU59266/80A patent/AU5926680A/en not_active Abandoned
- 1980-06-26 CA CA354,905A patent/CA1129248A/en not_active Expired
- 1980-07-01 DK DK284180A patent/DK284180A/en unknown
- 1980-07-10 AR AR281707A patent/AR227394A1/en active
- 1980-07-17 ZA ZA00804339A patent/ZA804339B/en unknown
- 1980-07-24 MX MX183283A patent/MX153040A/en unknown
- 1980-07-24 ES ES493714A patent/ES8104948A1/en not_active Expired
- 1980-07-25 NO NO802260A patent/NO802260L/en unknown
- 1980-07-25 JP JP10144880A patent/JPS5625457A/en active Granted
- 1980-07-25 BR BR8004688A patent/BR8004688A/en unknown
- 1980-07-25 IT IT8053430U patent/IT8053430V0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU5926680A (en) | 1981-01-29 |
| EP0023251A1 (en) | 1981-02-04 |
| ES493714A0 (en) | 1981-05-16 |
| DE2930303C2 (en) | 1982-12-30 |
| DK284180A (en) | 1981-01-27 |
| IT8053430V0 (en) | 1980-07-25 |
| BR8004688A (en) | 1981-02-10 |
| AR227394A1 (en) | 1982-10-29 |
| DE2930303A1 (en) | 1981-02-12 |
| JPS5625457A (en) | 1981-03-11 |
| JPS5747027B2 (en) | 1982-10-06 |
| ZA804339B (en) | 1981-07-29 |
| MX153040A (en) | 1986-07-22 |
| NO802260L (en) | 1981-01-27 |
| ES8104948A1 (en) | 1981-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |