US2453735A - Fountain solution roller - Google Patents
Fountain solution roller Download PDFInfo
- Publication number
- US2453735A US2453735A US573384A US57338445A US2453735A US 2453735 A US2453735 A US 2453735A US 573384 A US573384 A US 573384A US 57338445 A US57338445 A US 57338445A US 2453735 A US2453735 A US 2453735A
- Authority
- US
- United States
- Prior art keywords
- roller
- acid
- water
- fountain solution
- colloid
- 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 - Lifetime
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- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 33
- 239000002253 acid Substances 0.000 description 28
- 239000000084 colloidal system Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 235000006408 oxalic acid Nutrition 0.000 description 11
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 108010010803 Gelatin Proteins 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 8
- 229920000159 gelatin Polymers 0.000 description 8
- 239000008273 gelatin Substances 0.000 description 8
- 235000019322 gelatine Nutrition 0.000 description 8
- 235000011852 gelatine desserts Nutrition 0.000 description 8
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000004744 fabric Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- 239000004848 polyfunctional curative Substances 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000004312 hexamethylene tetramine Substances 0.000 description 4
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229920000084 Gum arabic Polymers 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 241000978776 Senegalia senegal Species 0.000 description 2
- 239000000205 acacia gum Substances 0.000 description 2
- 235000010489 acacia gum Nutrition 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000012445 acidic reagent Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical group OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 150000001845 chromium compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000004722 stifle Anatomy 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N7/00—Shells for rollers of printing machines
- B41N7/04—Shells for rollers of printing machines for damping rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/02—Top layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- B41N2207/00—Location or type of the layers in shells for rollers of printing machines
- B41N2207/14—Location or type of the layers in shells for rollers of printing machines characterised by macromolecular organic compounds
Definitions
- This invention relates to planographic printing and more especially to a water roller for applying an aqueous fountain solution to the surface of a planographic plate during the printing operation.
- the aqueous fountain solution thus applied maimtains the non-printing portions properly waterretentive and grease-repellent.
- An object of the invention therefore is to improve fountain solution rollers and to devise a coating and impregnating material which is of pronounced grease-rejecting character and which is adapted to reduce or substantially eliminate the occurrence of scumming when applied to a fountain solution roller.
- Another object is to provide a fountain solution roller element which is more e cient in applying aqueous materials; which is characterized by long life and which is cheap and easy to install.
- Fig. 1 is a perspective view illustrating a fountain solution roller of the invention.
- FIG. 2 is another perspective view illustrating a modification of the invention.
- the invention generally includes a fountain solution roller covered with a water-receptive material which contains an agent such as a dib-asic acid, for maintaining th water-receptive material free from tiny particles of greasy ink of the type commonly employed in planographic printing.
- Numeral 4 denotes an outer coating in which is contained a dibasic acid such as oxalic acid.
- a dibasic acid such as oxalic acid.
- the oxalic acid may be mixed with a water-receptive colloid such as, for example, gelatin, and it may also be desired to include a hardening agent for rendering the colloidal material tough and durable without loss of water-receptive character.
- hardening agents are formaldehyde, hexamethylenetetramine, chromium compounds and others.
- oxalic acid we ma also utilize other dibasic acids such as malonic acid, succinic acid, glutaric acid, adipic acid and th like.
- the dibasic acid may be employed in varying amounts such as are illustrated by the following examples:
- Example I '0 Oxalic acid gms 5 Gelatin mm 1 100 Water c..- 1000
- Example II 0xalic acid gms 40 Gelatin mm 100 Water c 1000
- Example III 0 Gelatin mm 100 Oxalic acid mm 25 Hexamethylenetetramine gms 50 Water c. c 1000 around the surface of the fountain solution roller in various ways as by applying it directly to the metal surface of the roller, or in conjunction with coverings such as fabrics, paper, plastic or. resinous substances utilized either in the form of a coating or a sleeve member which may be passed over the metal roller.
- the ability of a colloid, especially, to reject greasy ink and to provide for a limited degree of water-receptivity may be greatly improved by using the dibasic acid.
- the dibasic acid cooperates with hardening agents for the colloid, functioning to control 50 and modify the effect of the hardener on the colloid while remaining itself substantially unaffected by the hardener. Best results are obtained by using relatively large amounts of the chemical reagent and especially a .quantity or concen- For example, in Fig. 1 of the drawings we have tration which exceeds the amount of acid re- 3 agent required to maintain the colloid at its isoelecti'ic point.
- Thelatter term as employed herein denotes an acid pH value at which the colloid exhibits a maximum amount of swelling or waterreceptive character.
- the amounts of acidic reagent specified in Examples 11 and III are regarded as large in relation to the amount of colloid used and provide such an excess.
- the plate surface is conventionally supplied with small amounts of aqueous material containing a weak acid. If the surface of the printing plate acquires an alkaline pH value instead of an acid pH value, plate failure is very likely to take place.
- the dibasic acid may be applied in other ways, 1
- the coating 5 is permanently aflixed to the core, as distin uished from the case of a roller such as illustrated in Fig. i, in which it is intended that the sleeve member 2 may be detachably secured to the core.
- the core i may also be of plastic, fibrous materials, or other relatively stifl substances.
- colloid gelatin we may desire to use other colloids or water-receptive binders, such as glue, gum arabic, polyvinyl alcohol and others.
- other hardening agents may be employed in place of the hexamethylenetetramine or formaldehyde, as for example ferric chloride.
- a further modification may consist in the mixture of dibasic acid, colloid material and clays or other fillers.
- Another chemical reagent which may be desired to be employed consists of a mixture of a dibasic acid and a weak inorganic acid, as phosphoric acid.
- Still another regaent may consist of a mixture of a dibasic acid and a weak organic acid, such as gum arabic.
- a roller for use in planographic printing said roller being covered with a water-swellable material which includes a, water-soluble dibasic acid.
- a water roller for use in planographic printing, said roller including an outer peripheral coating which includes a water-swellable colloid and a watersoluble dibasic acid, for maintaining the colloid grease-repellent.
- a water roller for use in planographic printing said roller presenting an outer peripheral body which includes a water-swellable colloidal material in which are incorporated solid portions of oxalic acid, said acid being soluble in water drawn into the colloidal material during swelling.
- a water roller for use in planographic. printing said-roller presenting an outer peripheral body which includes gelatin, a chemical hardener for the' gelatin and oxalic acid.
- a water roller for use in planographic printing said roller presenting an outer peripheral body which includes a water-swellable colloid, a hardener, and a water-soluble dibasic acid.
- a water roller for use in planographic printing said roller presenting an outer peripheral body which includes polyvinyl alcohol, oxalic acid and a hardener.
- a water roller for use in planographic printing said roller presenting an outer peripheral body which includes a glue, oxalic acid and a hardener.
- V 8 As an article of manufacture a water roller for use in planographic printing, said roller presenting an outer peripheral body which includes gelatin, oxalic acid, and hexamethylenetetramine.
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- Printing Plates And Materials Therefor (AREA)
Description
v 1 1948. we; TOLAND ml. 2,453 13 FOUNTAIN sownon ROLLER Filed Jan. 18. 1945 Patented Nov, 16, 1948 FOUNTAIN SOLUTION ROLLER William Craig Toland, Brookline, and Munroe H.
Hamilton, Lexlngt Mass., assignors, by
mesne assignments, to William Craig Toland,
Brookline, Mass.
Application January 18, 1945, Serial No. 573,384
8 Claims. (Cl. 101-148) This invention relates to planographic printing and more especially to a water roller for applying an aqueous fountain solution to the surface of a planographic plate during the printing operation. The aqueous fountain solution thus applied maimtains the non-printing portions properly waterretentive and grease-repellent.
To further facilitate transfer of very limited quantities of the fountain solution to the plate surface, it is customary to employ a metal roll. usually brass, which is covered with a fabric commonly known as molleton." This fabric is required to be'sewed around the outer Periphery of the metal roller, an operation which is expensive and time-consuming. The life of the fabric on the press is relatively short. After a limited period of operation the fabric frequently develops a tendency to pick up small amounts of greas ink which may then be transferred to the non-printing portions of the printing plate, thus causing scumming, and a new fabric must be supplied.
An object of the invention therefore is to improve fountain solution rollers and to devise a coating and impregnating material which is of pronounced grease-rejecting character and which is adapted to reduce or substantially eliminate the occurrence of scumming when applied to a fountain solution roller. Another object is to provide a fountain solution roller element which is more e cient in applying aqueous materials; which is characterized by long life and which is cheap and easy to install. Other objects will appear from the following description.
In the accompanying drawings:
Fig. 1 is a perspective view illustrating a fountain solution roller of the invention; and
' illustrated a fountain solution roller l of some agent is a urea formaldehyde resin such as Plas- Fig. 2 is another perspective view illustrating a modification of the invention.
The invention generally includes a fountain solution roller covered with a water-receptive material which contains an agent such as a dib-asic acid, for maintaining th water-receptive material free from tiny particles of greasy ink of the type commonly employed in planographic printing.
We may .desire to apply the dibasic acid kon." Various other waterproofing resins and coating materials may be employed.
Numeral 4 denotes an outer coating in which is contained a dibasic acid such as oxalic acid. In forming the coating 4 the oxalic acid may be mixed with a water-receptive colloid such as, for example, gelatin, and it may also be desired to include a hardening agent for rendering the colloidal material tough and durable without loss of water-receptive character. Examples of hardening agents are formaldehyde, hexamethylenetetramine, chromium compounds and others. In place of oxalic acid we ma also utilize other dibasic acids such as malonic acid, succinic acid, glutaric acid, adipic acid and th like.
The dibasic acid may be employed in varying amounts such as are illustrated by the following examples:
Example I '0 Oxalic acid gms 5 Gelatin mm 1 100 Water c..- 1000 Example II 0xalic acid gms 40 Gelatin mm 100 Water c 1000 Example III 0 Gelatin mm 100 Oxalic acid mm 25 Hexamethylenetetramine gms 50 Water c. c 1000 around the surface of the fountain solution roller in various ways as by applying it directly to the metal surface of the roller, or in conjunction with coverings such as fabrics, paper, plastic or. resinous substances utilized either in the form of a coating or a sleeve member which may be passed over the metal roller.
It has been found that the ability of a colloid, especially, to reject greasy ink and to provide for a limited degree of water-receptivity, may be greatly improved by using the dibasic acid. In addition the dibasic acid cooperates with hardening agents for the colloid, functioning to control 50 and modify the effect of the hardener on the colloid while remaining itself substantially unaffected by the hardener. Best results are obtained by using relatively large amounts of the chemical reagent and especially a .quantity or concen- For example, in Fig. 1 of the drawings we have tration which exceeds the amount of acid re- 3 agent required to maintain the colloid at its isoelecti'ic point. Thelatter term as employed herein denotes an acid pH value at which the colloid exhibits a maximum amount of swelling or waterreceptive character. The amounts of acidic reagent specified in Examples 11 and III are regarded as large in relation to the amount of colloid used and provide such an excess.
When relatively large amounts of a reagent such as the dibasic acid are used, unexpectedly good results are obtained in connection with preventing grease-retention on the roller surface. With fabric-covered rollers of the conventional type, small amounts of greasy ink gradually tend to accumulate on the fabric and later become transferred to the non-printing portions of a plate over which the roller is passed, thus producing an objectionable print. The presence of the dibasic acid described effectually prevents small amounts of grease from collecting on the surface of the roll throughout an extended period of use. The ability of the acid to exercise this function in conjunction with a hardening agent for the colloid provides for greatly increased durability of the colloid, and hence long and uninterrupted periods of operation with elimination of the expense and trouble attendant upon the use of stitched molleton covers.
During operation of a planographic printing press, the plate surface is conventionally supplied with small amounts of aqueous material containing a weak acid. If the surface of the printing plate acquires an alkaline pH value instead of an acid pH value, plate failure is very likely to take place. Having in mind the requirement for an acid pH value at a planographic printing plate surface, it is suggested that one action of a chemical reagent, such as oxalic acid or other dibasic acid, may be to become associated with the colloid on the colloid coating 4 on the roller, so that the reagent may tend to maintain an acid pH value which in turn maintains a sharp greaserepellent character at the surface of the roller, and indirectly at the non-printing portions of a printing plate over which the roller passes- It should be understood, however, that this explanation of the theory of operation of the dibasic acid, as well as any others appearing in the specification, are given by way of suggestion only and are not to be taken in a limiting sense.
The dibasic acid may be applied in other ways, 1
as for example that illustrated in Fig. 2 of the drawings, in which the acid is applied directly.
over the metal surface of the fountain solution roller I in conjunction with a water-receptive binder to form a coating 5. In such an'arrangement, the coating 5 is permanently aflixed to the core, as distin uished from the case of a roller such as illustrated in Fig. i, in which it is intended that the sleeve member 2 may be detachably secured to the core.
The core i may also be of plastic, fibrous materials, or other relatively stifl substances. In place of the colloid gelatin, we may desire to use other colloids or water-receptive binders, such as glue, gum arabic, polyvinyl alcohol and others. Similarly, other hardening agents may be employed in place of the hexamethylenetetramine or formaldehyde, as for example ferric chloride. A further modification may consist in the mixture of dibasic acid, colloid material and clays or other fillers. Another chemical reagent which may be desired to be employed consists of a mixture of a dibasic acid and a weak inorganic acid, as phosphoric acid. Still another regaent may consist of a mixture of a dibasic acid and a weak organic acid, such as gum arabic.
While we have described a preferred embodiment of our invention, it should be understood that various changes and modifications may be resorted to, without departing from the spirit of theinvention as defined in the appended claims.
We claim:
1. As an article of manufacture a roller for use in planographic printing, said roller being covered with a water-swellable material which includes a, water-soluble dibasic acid.
2. As an article of manufacture a water roller for use in planographic printing, said roller including an outer peripheral coating which includes a water-swellable colloid and a watersoluble dibasic acid, for maintaining the colloid grease-repellent.
3. As an article of manufacture a water roller for use in planographic printing, said roller presenting an outer peripheral body which includes a water-swellable colloidal material in which are incorporated solid portions of oxalic acid, said acid being soluble in water drawn into the colloidal material during swelling.
4. As an article of manufacture a water roller for use in planographic. printing, said-roller presenting an outer peripheral body which includes gelatin, a chemical hardener for the' gelatin and oxalic acid.
5. As an article of manufacture a water roller for use in planographic printing, said roller presenting an outer peripheral body which includes a water-swellable colloid, a hardener, and a water-soluble dibasic acid.
6. As an article of manufacture a water roller for use in planographic printing, said roller presenting an outer peripheral body which includes polyvinyl alcohol, oxalic acid and a hardener.
7. As an article of manufacture a water roller for use in planographic printing, said roller presenting an outer peripheral body which includes a glue, oxalic acid and a hardener.
V 8. As an article of manufacture a water roller for use in planographic printing, said roller presenting an outer peripheral body which includes gelatin, oxalic acid, and hexamethylenetetramine.
- WILLIAM CRAIG TOLAND.
MUNROE H. HAMILTON.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,712,077 Hrubesky et al. May 6, 1929 2,007,588 Wescott July 9, 1935 2,186,946 Wood Jan. 16, 1940 2,220,278 Rapport Nov. 5, 1940
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US573384A US2453735A (en) | 1945-01-18 | 1945-01-18 | Fountain solution roller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US573384A US2453735A (en) | 1945-01-18 | 1945-01-18 | Fountain solution roller |
Publications (1)
Publication Number | Publication Date |
---|---|
US2453735A true US2453735A (en) | 1948-11-16 |
Family
ID=24291777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US573384A Expired - Lifetime US2453735A (en) | 1945-01-18 | 1945-01-18 | Fountain solution roller |
Country Status (1)
Country | Link |
---|---|
US (1) | US2453735A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2532866A (en) * | 1944-10-21 | 1950-12-05 | Toland William Craig | Method and plate for lithographic printing |
US2538751A (en) * | 1948-04-01 | 1951-01-23 | Edward D Hill | Inking roller manufacture |
US2635534A (en) * | 1948-04-30 | 1953-04-21 | Huebner Company | Process for preparing an electrographic reproduction instrumentality |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1712077A (en) * | 1928-03-14 | 1929-05-07 | Clarence E Hrubesky | Water-resistant animal glue |
US2007588A (en) * | 1932-09-02 | 1935-07-09 | Multigraph Co | Dampening method and means for planographic printing |
US2186946A (en) * | 1938-02-10 | 1940-01-16 | Harris Seybold Potter Co | Preparing lithographic plates |
US2220278A (en) * | 1938-01-24 | 1940-11-05 | Rapid Roller Co | Damping mechanism for lithographic presses |
-
1945
- 1945-01-18 US US573384A patent/US2453735A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1712077A (en) * | 1928-03-14 | 1929-05-07 | Clarence E Hrubesky | Water-resistant animal glue |
US2007588A (en) * | 1932-09-02 | 1935-07-09 | Multigraph Co | Dampening method and means for planographic printing |
US2220278A (en) * | 1938-01-24 | 1940-11-05 | Rapid Roller Co | Damping mechanism for lithographic presses |
US2186946A (en) * | 1938-02-10 | 1940-01-16 | Harris Seybold Potter Co | Preparing lithographic plates |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2532866A (en) * | 1944-10-21 | 1950-12-05 | Toland William Craig | Method and plate for lithographic printing |
US2538751A (en) * | 1948-04-01 | 1951-01-23 | Edward D Hill | Inking roller manufacture |
US2635534A (en) * | 1948-04-30 | 1953-04-21 | Huebner Company | Process for preparing an electrographic reproduction instrumentality |
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