CA1036865A - Spray dampening system for high quality offset printing - Google Patents
Spray dampening system for high quality offset printingInfo
- Publication number
- CA1036865A CA1036865A CA219,461A CA219461A CA1036865A CA 1036865 A CA1036865 A CA 1036865A CA 219461 A CA219461 A CA 219461A CA 1036865 A CA1036865 A CA 1036865A
- Authority
- CA
- Canada
- Prior art keywords
- spray
- dampening
- roll
- roller means
- length
- 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
- 239000007921 spray Substances 0.000 title claims abstract description 66
- 238000007645 offset printing Methods 0.000 title description 5
- 238000007639 printing Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 5
- 239000010408 film Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000002301 combined effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/20—Details
- B41F7/24—Damping devices
- B41F7/30—Damping devices using spraying elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Abstract
ABSTRACT
Disclosed is a dampening roll which receives spray from a multi-nozzle spray member having a pair of overspray preventing shields mounted at opposite ends of the spray path and projecting into close relation to the dampening roll. An oscillating roll runs against the dampening roll to spread the moisture film and a wet form roll provides con-tact between the oscillating roll and the plate cylinder.
The oscillating roll has a length generally equal to the length of the wet form roll plus the oscillating roll stroke length and the dampening roll has a length slightly less than the length of the oscillating roll plus the oscillating roll stroke length. Preferably, the spray member oscillates transversely along the dampening roll and the distance between the inside surfaces of the spray shields plus the spray member stroke is slightly less than the length of the dampening roll.
Disclosed is a dampening roll which receives spray from a multi-nozzle spray member having a pair of overspray preventing shields mounted at opposite ends of the spray path and projecting into close relation to the dampening roll. An oscillating roll runs against the dampening roll to spread the moisture film and a wet form roll provides con-tact between the oscillating roll and the plate cylinder.
The oscillating roll has a length generally equal to the length of the wet form roll plus the oscillating roll stroke length and the dampening roll has a length slightly less than the length of the oscillating roll plus the oscillating roll stroke length. Preferably, the spray member oscillates transversely along the dampening roll and the distance between the inside surfaces of the spray shields plus the spray member stroke is slightly less than the length of the dampening roll.
Description
This invention relates to moistening apparatus for lithographic printing presses and more particularly to an improved spray dampening system for high quality offset printing.
Basic spray dampening systems suitable for highly satisfactory operation under varied conditions of press feed, paper sur~ace and ink requlrement~ are known, for example, United States Patent No. 3,651,756~1ssued Narch 28, 1972. However, where very high quality printing on certain very smooth paper ls required, such dampening systems tend to occasionally produce slight printing irregularlties or streaks correspond-ing to minor variations in the density of moisture disposi-tion along the spray path. particularly troublesome in this regard is the moisture disposition at the ends of the spray receiving roll or rolls, since it requires the end spray nozzles to be placed in positions which result in roll end overspray which tends to wet adjacent shafts and machine p~rts. This is especially undesirable in the meticulously maintained presses utilized for very high quality printing.
Attempts to circumvent the problem by utilizing extra long and/
or reciprocating rollers to respectively receive and smooth the uneven moisture film heretofore have been eit~er impracti-cal or create new problems, such as excesæ water or ink form-ing into rings at the edge of rolls and being slung off at high rotational speeds.
The principal ob~ects of the present inventlon are:
to provide spray dampening apparatus for high quality offset printing presses which creates a highly uniform moisture film application; t~ provide such a system where~n the spray is applied to dampening rolls without edge overspray; to provide such a system wherein the spray member is reciprocated for additional moisture film uniformity; to provide such a ~036865 dampening arrangement wherein mo~sture transPer rolls have a length relation-ship to each other which is practical and avoids the problem of moisture or ink slinging off at the ends; to provide such a system which utilizes an oscillating transfer roll between a dampening roll and form roll for smoothing the moisture film; to provide such offset press dampening apparatus which permits end spray nozzles to be placed in overspray positions without produc-ing overspray; and to provide æuch an arrangement which is relatively in-expensive to produce, reliable in use, easily maintained and generally well adapted for its intended purpose, According to the invention there is provided, in combination with a printing press having a frame, an inking train and an offset plate cylinder which engages a blanket cylinder for transferring an ink image thereto, dampening apparatus comprising: an elongated spray member having a line of several dampening liquid atomizing spray nozzles positioned on said press in laterally spaced relation; dampening roller means having opposite ends, said dampening roller means being positioned to receive spray from said nozzles and having a length between said roller means ends less than the spray path witth emitted from said nozzles whereby said spray path extends beyond said roller means ends; a pair of spray shield means associated with said spray member and respectively positioned to intersect and prevent overspray beyond said roller means ends; said spray shield means having free dripping lower portions positioned over said roller means whereby intersected spray is dripped onto said roller means; and transfer means contacting said dampening roller means and transferring moisture to said plate cylinder.
Other objects and advantages of this invention will become apparent from the following description taken in connection with the accompanying drawings wherein are set forth by way of illustration and exemplify certain embodiments of this invention Figure 1 is a schematic side elevation illustrating ~ ~ 2 10~65 an offset printing press ink and moisture roller train embodying this invention.
Fig. 2 is a fragmentary, schematic, front elevation showing the relationship between the spray member and ~arious rollers in the moisture train.
Fig. 3 is a fragmentary perspective view further illustrating the relationship between the spray member and dampening rollers.
Fig. 4 is a fragmentary schematic, front elevation similar to Fig. 2 but on a larger scale and showing the relationship between the spray bar and a moisture receiving roller.
Fig. 5 is a fragmentary ~ide elevatlonal view show-lng the relationship between the spray member end shield and a pair of dampening rollers.
Fig. 6 is a view similar to Fig. 5 but showing a modified form which utilizes a single dampening roller.
Fig. 7 is similar to Fig. 4 but showing a modified form utillzing a stationary spray member.
Referring to the drawings in more detail:
Reference numeral 1 (Fig. 1) generally indicates a printing press incorporating dampening apparatus embodying thiæ invention. The press 1 has an inking train, generally designated 2, which carries ink to an offset plate cylinder 3 engaging a blanket cylinder 4 for transferring an ink image thereto. The image is deposited, in this example, upon a paper web 5 which is backed by a suitable impression cylinder 6.
The ~nking train 2 is comprised of an inking foun-tain 7 containing, in this example, suitable paste ink 8 which is fed to a hard surface fountain roller 9 and carried by a reciprocating, resilient surface ductor roller 10 to a hard ~036865 surface distributor roller 11. Resilient surface distributor rollers 12 and 13 and hard surface distributor rollers 14 and 15 operate to smooth the ink film and transfer it to hard surface vibrator roller 16 and further distributor rollers 17 and 18, the vibrator roller 16 being in contact with resilient surface form rollers 19 and 20 which deposit the ink film, where appropriate, onto a printing plate 21 carried by the plate cylinder 3. The distributor roller 18 runs in contact with a vibrating oroscillating roller 22 which, in this example, contacts a further form roller 23 in operative engage-ment with the printing plate 21.
An elongated spray member or bar 24, preferably of the general type described in U. S. Patent No. 3,651,756, has several aligned, liquid atomizing, spray nozzles 25 positioned in laterally spaced relation, the group including end nozzles 26 and 27. The nozzles 25 are fed through suitable sou~ces (not shown) connected by flexible liquid and compressed air . llnes 28.
; In the example of Figs. 1, 2, 3 and 5, a pair of contacting, resllient surface (e.g., 25-30 durometer) dampen-ing rolls 29 and 30 are positioned to receive spray mist 31 from the respective nozzles 25 and each has a length generally equal to the effective spray path width emitted from the com-bined nozzles, as explained further below. A pair of spray shields 32 and 33 are mounted on the spray bar 24 and respec-- tively positioned near opposite ends of the line of spray nozzles 25. The shields 32 and 33 project into close relation to the dampening rollers 29 and 30 and respectively have inside surface~ 34 and 35 positioned to intersect a portion of the spray emitted from the end nozzles 26 and 27.
In the example of Figs. 1-4, the spray bar 24 is suitably mounted upon a rod 36 for lateral reciprocal motion ` 1OaU~EU6S
along the dampening rollers 29 and 30. A motor 37 is illus-trated as driving a crank arrangement 38 to produce the recip-rocation through an appropriate connecting link 39, however, it is to be understood that any suitable means of reciprocal mounting and driving may be utilized for the purpose, includ-ing a mechanical take-off from the printing press drive (not shown).
The length o~ the dampening rolls 29 and 30, that is, the distance between the ends 40 and 41 thereof, is slightly greater than the distance between the spray shield inside surfaces 34 and 35 plus the distance of the spray bar crank stroke 42, Fig. 4. Thus, the spray shields 32 and 33 project into close relation to the dampening rollers 29 and 30 and the inside surfaces 34 and 35 are positioned to prevent overspray beyond the ends 40 and 41. Liquid dripping from the shields 32 and 33 is milled into the uniformly thin moisture film formed on the roller 30 by coaction with the roller 29 note the bight formed therebetween, Fig. 1.
The oscillating roller 22 contacts the roller 30, in addition to the wet form roll 23 and distributing roll 18, for further smoothing and transferring moisture to the plate 21. The oscillating roller 22 has a length or distance be-tween ends 43 and 44 generally equal to the length of the form roller 23 plus the stroke length of the oscillating roller 22, in Fig. Z. To complete the proper relationship, the dampening rollers 29 and 30 have a length slightly less, for example around 1/8 inch, than the length of the oscillating roll 22 plus the oscillating roll stroke length 45.
Oper~ting parameters may vary considerably in the practice of the invention, however, recommended stroke length of the reciprocating spray bar for typical 17'l to 20" web presses range from 3/4 of an inch to 4 inches and oscillating 1036~iS
speed preferably varies with operating press speed, a suitable relationship being 150 bar strokes per minute when the press is rotating at a speed of l,000 web feet per minute. Also, it is desirable to control the relative diameters of the dampen-ing, oscillating and form rollers so that there is no contin-uously repeating relationship whicb would tend to affect the smooth application of the moisture film. This avoidance of continuously repeating relationship should also be considered in determining the reciprocating frequency of the spray bar 24 and oscillating roll 22.
Fig. 7 illustrates a form of the invention wherein the spray bar 46 is stationary. In this embodiment, the spray shield inside surfaces 47 and 48 do not move but are contin-ually located ~ust inside the ends 49 and 50 of the dampening roller 51 receivlng the spray, thereby preventing overspray as described abo~e. Any excess moisture collecting on the surfaces 47 and 48 drips from the dampening roller or rollers and is milled into the uniformly thin moisture film carried to the printing plate.
Rig. 6 illustrates a further modified form of this invention which utilizes a single dampening roller 52 co-act-ing with the spray bar 53 and spray shields 54, instead of the pair of dampening rollers described above. In the embodi-ment of Fig. 6 the dampening roll 52 receives the spray or mist from the spray bar 53 and carries it directly to the oscillating roll 55 for thin film formation and delivery along the roller train.
In operation, a highly uniform and effective film of moisture is,transferred to the printing plate for high 3o quality offset printing without dampening roller overspray and without the formation of moisture or ink rings at the end of transfer rollers, which would tend to sling off, 10368~;5 causing difficulties during production runs.
Basic spray dampening systems suitable for highly satisfactory operation under varied conditions of press feed, paper sur~ace and ink requlrement~ are known, for example, United States Patent No. 3,651,756~1ssued Narch 28, 1972. However, where very high quality printing on certain very smooth paper ls required, such dampening systems tend to occasionally produce slight printing irregularlties or streaks correspond-ing to minor variations in the density of moisture disposi-tion along the spray path. particularly troublesome in this regard is the moisture disposition at the ends of the spray receiving roll or rolls, since it requires the end spray nozzles to be placed in positions which result in roll end overspray which tends to wet adjacent shafts and machine p~rts. This is especially undesirable in the meticulously maintained presses utilized for very high quality printing.
Attempts to circumvent the problem by utilizing extra long and/
or reciprocating rollers to respectively receive and smooth the uneven moisture film heretofore have been eit~er impracti-cal or create new problems, such as excesæ water or ink form-ing into rings at the edge of rolls and being slung off at high rotational speeds.
The principal ob~ects of the present inventlon are:
to provide spray dampening apparatus for high quality offset printing presses which creates a highly uniform moisture film application; t~ provide such a system where~n the spray is applied to dampening rolls without edge overspray; to provide such a system wherein the spray member is reciprocated for additional moisture film uniformity; to provide such a ~036865 dampening arrangement wherein mo~sture transPer rolls have a length relation-ship to each other which is practical and avoids the problem of moisture or ink slinging off at the ends; to provide such a system which utilizes an oscillating transfer roll between a dampening roll and form roll for smoothing the moisture film; to provide such offset press dampening apparatus which permits end spray nozzles to be placed in overspray positions without produc-ing overspray; and to provide æuch an arrangement which is relatively in-expensive to produce, reliable in use, easily maintained and generally well adapted for its intended purpose, According to the invention there is provided, in combination with a printing press having a frame, an inking train and an offset plate cylinder which engages a blanket cylinder for transferring an ink image thereto, dampening apparatus comprising: an elongated spray member having a line of several dampening liquid atomizing spray nozzles positioned on said press in laterally spaced relation; dampening roller means having opposite ends, said dampening roller means being positioned to receive spray from said nozzles and having a length between said roller means ends less than the spray path witth emitted from said nozzles whereby said spray path extends beyond said roller means ends; a pair of spray shield means associated with said spray member and respectively positioned to intersect and prevent overspray beyond said roller means ends; said spray shield means having free dripping lower portions positioned over said roller means whereby intersected spray is dripped onto said roller means; and transfer means contacting said dampening roller means and transferring moisture to said plate cylinder.
Other objects and advantages of this invention will become apparent from the following description taken in connection with the accompanying drawings wherein are set forth by way of illustration and exemplify certain embodiments of this invention Figure 1 is a schematic side elevation illustrating ~ ~ 2 10~65 an offset printing press ink and moisture roller train embodying this invention.
Fig. 2 is a fragmentary, schematic, front elevation showing the relationship between the spray member and ~arious rollers in the moisture train.
Fig. 3 is a fragmentary perspective view further illustrating the relationship between the spray member and dampening rollers.
Fig. 4 is a fragmentary schematic, front elevation similar to Fig. 2 but on a larger scale and showing the relationship between the spray bar and a moisture receiving roller.
Fig. 5 is a fragmentary ~ide elevatlonal view show-lng the relationship between the spray member end shield and a pair of dampening rollers.
Fig. 6 is a view similar to Fig. 5 but showing a modified form which utilizes a single dampening roller.
Fig. 7 is similar to Fig. 4 but showing a modified form utillzing a stationary spray member.
Referring to the drawings in more detail:
Reference numeral 1 (Fig. 1) generally indicates a printing press incorporating dampening apparatus embodying thiæ invention. The press 1 has an inking train, generally designated 2, which carries ink to an offset plate cylinder 3 engaging a blanket cylinder 4 for transferring an ink image thereto. The image is deposited, in this example, upon a paper web 5 which is backed by a suitable impression cylinder 6.
The ~nking train 2 is comprised of an inking foun-tain 7 containing, in this example, suitable paste ink 8 which is fed to a hard surface fountain roller 9 and carried by a reciprocating, resilient surface ductor roller 10 to a hard ~036865 surface distributor roller 11. Resilient surface distributor rollers 12 and 13 and hard surface distributor rollers 14 and 15 operate to smooth the ink film and transfer it to hard surface vibrator roller 16 and further distributor rollers 17 and 18, the vibrator roller 16 being in contact with resilient surface form rollers 19 and 20 which deposit the ink film, where appropriate, onto a printing plate 21 carried by the plate cylinder 3. The distributor roller 18 runs in contact with a vibrating oroscillating roller 22 which, in this example, contacts a further form roller 23 in operative engage-ment with the printing plate 21.
An elongated spray member or bar 24, preferably of the general type described in U. S. Patent No. 3,651,756, has several aligned, liquid atomizing, spray nozzles 25 positioned in laterally spaced relation, the group including end nozzles 26 and 27. The nozzles 25 are fed through suitable sou~ces (not shown) connected by flexible liquid and compressed air . llnes 28.
; In the example of Figs. 1, 2, 3 and 5, a pair of contacting, resllient surface (e.g., 25-30 durometer) dampen-ing rolls 29 and 30 are positioned to receive spray mist 31 from the respective nozzles 25 and each has a length generally equal to the effective spray path width emitted from the com-bined nozzles, as explained further below. A pair of spray shields 32 and 33 are mounted on the spray bar 24 and respec-- tively positioned near opposite ends of the line of spray nozzles 25. The shields 32 and 33 project into close relation to the dampening rollers 29 and 30 and respectively have inside surface~ 34 and 35 positioned to intersect a portion of the spray emitted from the end nozzles 26 and 27.
In the example of Figs. 1-4, the spray bar 24 is suitably mounted upon a rod 36 for lateral reciprocal motion ` 1OaU~EU6S
along the dampening rollers 29 and 30. A motor 37 is illus-trated as driving a crank arrangement 38 to produce the recip-rocation through an appropriate connecting link 39, however, it is to be understood that any suitable means of reciprocal mounting and driving may be utilized for the purpose, includ-ing a mechanical take-off from the printing press drive (not shown).
The length o~ the dampening rolls 29 and 30, that is, the distance between the ends 40 and 41 thereof, is slightly greater than the distance between the spray shield inside surfaces 34 and 35 plus the distance of the spray bar crank stroke 42, Fig. 4. Thus, the spray shields 32 and 33 project into close relation to the dampening rollers 29 and 30 and the inside surfaces 34 and 35 are positioned to prevent overspray beyond the ends 40 and 41. Liquid dripping from the shields 32 and 33 is milled into the uniformly thin moisture film formed on the roller 30 by coaction with the roller 29 note the bight formed therebetween, Fig. 1.
The oscillating roller 22 contacts the roller 30, in addition to the wet form roll 23 and distributing roll 18, for further smoothing and transferring moisture to the plate 21. The oscillating roller 22 has a length or distance be-tween ends 43 and 44 generally equal to the length of the form roller 23 plus the stroke length of the oscillating roller 22, in Fig. Z. To complete the proper relationship, the dampening rollers 29 and 30 have a length slightly less, for example around 1/8 inch, than the length of the oscillating roll 22 plus the oscillating roll stroke length 45.
Oper~ting parameters may vary considerably in the practice of the invention, however, recommended stroke length of the reciprocating spray bar for typical 17'l to 20" web presses range from 3/4 of an inch to 4 inches and oscillating 1036~iS
speed preferably varies with operating press speed, a suitable relationship being 150 bar strokes per minute when the press is rotating at a speed of l,000 web feet per minute. Also, it is desirable to control the relative diameters of the dampen-ing, oscillating and form rollers so that there is no contin-uously repeating relationship whicb would tend to affect the smooth application of the moisture film. This avoidance of continuously repeating relationship should also be considered in determining the reciprocating frequency of the spray bar 24 and oscillating roll 22.
Fig. 7 illustrates a form of the invention wherein the spray bar 46 is stationary. In this embodiment, the spray shield inside surfaces 47 and 48 do not move but are contin-ually located ~ust inside the ends 49 and 50 of the dampening roller 51 receivlng the spray, thereby preventing overspray as described abo~e. Any excess moisture collecting on the surfaces 47 and 48 drips from the dampening roller or rollers and is milled into the uniformly thin moisture film carried to the printing plate.
Rig. 6 illustrates a further modified form of this invention which utilizes a single dampening roller 52 co-act-ing with the spray bar 53 and spray shields 54, instead of the pair of dampening rollers described above. In the embodi-ment of Fig. 6 the dampening roll 52 receives the spray or mist from the spray bar 53 and carries it directly to the oscillating roll 55 for thin film formation and delivery along the roller train.
In operation, a highly uniform and effective film of moisture is,transferred to the printing plate for high 3o quality offset printing without dampening roller overspray and without the formation of moisture or ink rings at the end of transfer rollers, which would tend to sling off, 10368~;5 causing difficulties during production runs.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In combination with a printing press having a frame, an inking train and an offset plate cylinder which engages a blanket cylinder for transferring an ink image thereto, dampening apparatus comprising:
(a) an elongated spray member having a line of several dampening liquid atomizing spray nozzles positioned on said press in laterally spaced relation;
(b) dampening roller means having opposite ends, said dampening roller means being positioned to receive spray from said nozzles and having a length between said roller means ends less than the spray path width emitted from said nozzles whereby said spray path extends beyond said roller means ends;
(c) a pair of spray shield means associated with said spray member and respectively positioned to intersect and prevent overspray beyond said roller means ends;
(d) said spray shield means having free dripping lower portions positioned over said roller means whereby intersected spray is dripped onto said roller means; and (e) transfer means contacting said dampening roller means and trans-ferring moisture to said plate cylinder.
(a) an elongated spray member having a line of several dampening liquid atomizing spray nozzles positioned on said press in laterally spaced relation;
(b) dampening roller means having opposite ends, said dampening roller means being positioned to receive spray from said nozzles and having a length between said roller means ends less than the spray path width emitted from said nozzles whereby said spray path extends beyond said roller means ends;
(c) a pair of spray shield means associated with said spray member and respectively positioned to intersect and prevent overspray beyond said roller means ends;
(d) said spray shield means having free dripping lower portions positioned over said roller means whereby intersected spray is dripped onto said roller means; and (e) transfer means contacting said dampening roller means and trans-ferring moisture to said plate cylinder.
2. The combination as set forth in claim 1 wherein:
(a) said dampening roller means is a pair of dampening rollers in contacting relation.
(a) said dampening roller means is a pair of dampening rollers in contacting relation.
3. The combination as set forth in claim 2 wherein:
(a) said dampening rollers both have a resilient surface.
(a) said dampening rollers both have a resilient surface.
4. The combination as set forth in claim 1 including:
(a) means reciprocating said spray member longitudinally of said dampening roller means; and (b) said reciprocation providing a portion of said spray path width.
(a) means reciprocating said spray member longitudinally of said dampening roller means; and (b) said reciprocation providing a portion of said spray path width.
5. The combination as set forth in claim 1 wherein:
(a) said spray shield means comprises a spray shield mounted on said spray member and projecting downwardly therefrom,
(a) said spray shield means comprises a spray shield mounted on said spray member and projecting downwardly therefrom,
6. The combination as set forth in claim 1 wherein:
(a) said spray member is directed substantially vertically downwardly toward said dampening roller means.
(a) said spray member is directed substantially vertically downwardly toward said dampening roller means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49129074A | 1974-07-24 | 1974-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1036865A true CA1036865A (en) | 1978-08-22 |
Family
ID=23951580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA219,461A Expired CA1036865A (en) | 1974-07-24 | 1975-02-05 | Spray dampening system for high quality offset printing |
Country Status (4)
| Country | Link |
|---|---|
| JP (2) | JPS5114408A (en) |
| CA (1) | CA1036865A (en) |
| DE (2) | DE7442188U (en) |
| GB (1) | GB1459063A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6183918U (en) * | 1985-07-15 | 1986-06-03 | ||
| US5025722A (en) * | 1990-01-22 | 1991-06-25 | Ryco Graphic Manufacturing, Inc. | Adjustable spray dampening system |
| GB2294662B (en) * | 1994-11-02 | 1999-04-14 | Robert Ranft | A damping system for a printing press |
| US6374732B1 (en) * | 2000-06-05 | 2002-04-23 | Frank Perretta | Dampener for use in lithographic presses |
| DE10317470B4 (en) * | 2003-04-16 | 2005-10-06 | Technotrans Ag | spray dampening |
| DE102007015402A1 (en) | 2007-03-30 | 2008-10-09 | Koenig & Bauer Aktiengesellschaft | Dampening unit for a printing unit of a printing machine |
| DE102007053368A1 (en) * | 2007-11-09 | 2009-05-14 | Manroland Ag | Dampening system for offset printing unit of web-fed printing machine, has outer covering element assigned to covers viewed in axial direction of distributor roller, to adjust dampening agent amount depending on print substrate format |
| DE102011075600B4 (en) | 2011-05-10 | 2014-02-20 | Koenig & Bauer Aktiengesellschaft | Dampening unit of an offset printing unit |
| DE102011075598B4 (en) | 2011-05-10 | 2013-11-07 | Koenig & Bauer Aktiengesellschaft | Dampening unit of an offset printing unit |
| DE102011075599B4 (en) | 2011-05-10 | 2014-10-23 | Koenig & Bauer Aktiengesellschaft | Dampening unit of an offset printing unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4214412Y1 (en) * | 1964-04-20 | 1967-08-17 | ||
| US3651756A (en) * | 1969-08-11 | 1972-03-28 | Roy R Smith Jr | Spray dampening system with individual metering pumps for offset press |
-
1974
- 1974-12-19 DE DE19747442188 patent/DE7442188U/en not_active Expired
- 1974-12-19 DE DE19742460021 patent/DE2460021A1/en active Pending
-
1975
- 1975-01-28 JP JP50011840A patent/JPS5114408A/ja active Pending
- 1975-01-29 GB GB396275A patent/GB1459063A/en not_active Expired
- 1975-02-05 CA CA219,461A patent/CA1036865A/en not_active Expired
-
1978
- 1978-05-16 JP JP6559978U patent/JPS542003U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS542003U (en) | 1979-01-08 |
| DE2460021A1 (en) | 1976-03-18 |
| GB1459063A (en) | 1976-12-22 |
| DE7442188U (en) | 1977-04-28 |
| JPS5114408A (en) | 1976-02-04 |
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