Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3800702 A
Publication typeGrant
Publication dateApr 2, 1974
Filing dateDec 7, 1972
Priority dateDec 7, 1972
Also published asCA999781A1, DE2344573A1, DE2344573B2, DE2344573C3
Publication numberUS 3800702 A, US 3800702A, US-A-3800702, US3800702 A, US3800702A
InventorsL Roberts
Original AssigneeS & S Corrugated Paper Mach
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Inking apparatus having automatic wash-up means
US 3800702 A
Abstract
An inking unit, including an ink fountain formed between an inking cylinder and a scraper type doctor blade, is provided with an automatic wash-up system. The latter includes spray pipes having nozzles that direct cleansing and rinsing fluids against the ink engaging elements. Much of these cleansing and rinsing fluids are recirculated to prevent waste, with recirculating being effected by the same pump that delivers ink to the reservoir from which ink is supplied to the fountain.
Images(3)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

UnitedStates Patent [1 1 Roberts [1110 3,800,702 {45], Apr. 2, 1974 INKING APPARATUS HAVING AUTOMATIC WASH-UP MEANS [75] Inventor: Lawrence Roberts, Huntington Beach, Calif.

[73] Assignee: S & S Corrugated Paper Machinery Co., Inc., Brooklyn, NY,

[22] Filed: Dec. 7, 1972 [21] Appl. No.: 311,705

[52] US. Cl 101/425, l5/256.5l, 101/365,

118/203 [51] Int. Cl B411 35/04, B411 41/04 [58] Field of Search [01/423, 424, 425, 364,

[56] References Cited UNITED STATES PATENTS 194,218 8/1877 Campbell 101/364 3,658,003 4/1972 Johnson 101/366 3,486,448 12/1969 Anderson et al. 101/425 2,055,272 9/1936 Weiss l0l/424 X FOREIGN PATENTS OR APPLICATIONS 94,507 7/1969 France lOl/l67 1,517,914 2/1968 France 101/167 Primary Examiner-Clyde l. Coughenour Attorney, Agent, or Firm-Ostrolenk, Faber, Gerb &

Soffen [57] ABSTRACT An inking unit, including an ink fountain formed between an inking cylinder and a scraper type doctor blade, is provided with an automatic wash-up system. The latter includes spray pipes having nozzles that direct cleansing and rinsing fluids against the ink engaging elements. Much of these cleansing and rinsing fluids are recirculated to prevent waste, with recirculating being effected by the same pump that delivers ink to the reservoir from which ink is supplied to the founmin.

11 Claims, 4 Drawing Figures DAIENIEBAPR 21914 $800,702

saw 1 or 3 J's-"L PATENTEDAPR 2 m4 3.800.702

sum 3 BF 3 g N/ N/ INKING APPARATUS HAVING AUTOMATIC WASH-UP MEANS Whenever it becomes necessary to change the color of the ink being used, all of the ink contacting elements must be washed clean before the new color ink is introduced to the inking apparatus. Not only does this washup usually require extensive down time for the printer and associated equipment, but the job requires much operator time, is a very dirty task, and is often not performed to a desirable degree.

Accordingly, the instant invention provides an automatic wash-up system for inking apparatus including spray pipes that are strategically located for the proper application of cleansing and rinsing fluids, so that the inking cylinder, the doctor blade, and the other fountain forming elements are effectively cleaned in a short period of time without the utilization of manpower.

Thus, a primary object of the instant invention is to provide novel apparatus for automatically washing inking apparatus used for printing and coating equipment.

Another object is to provide automatic wash-up apparatus of this type that is not wasteful of cleansing and/or rinsing fluids.

A further object is to provide automatic wash-up apparatus of this type in which cleansing and rinsing fluids are circulated through the system by the same pump that delivers ink to the ink supply reservoir.

These objects as well as other objects of this invention will become readily apparent after reading the following description of the accompanying drawings in which:

FIG. 1 is a perspective illustrating, in simplified form, an inking unit and an automatic wash-up system therefor, the latter being constructed in accordance with teachings of the instant invention.

FIG. 2 is a cross-section taken through line 2-2 of FIG. 1, looking in the direction of arrows 2--2.

FIG. 3 is a diagram of the operational selector and the programmer for the automatic wash-up system.

FIG. 4 is a program chart showing the operational intervals for the elements of the wash-up apparatus.

Now referring to the figures. The inking elements of FIG. 1 are generally of a type described in the aforesaid U. S. Pat. No. 3,630,146 and include elongated inking cylinder 11 mounted for rotation on axial extensions 12, 13. Cylinder 11, together with elongated scraper blade 15 and its open-ended support 16 of generally V- shaped cross-section, define trough-like ink fountain 14 (FIG. 2). Clamping element 17 removably secures blade 15 to support 16. lnk catcher or drip pan 18 is positioned below cylinder 11 and the elements defining fountain 14 to catch ink flowing out the open ends of fountain 14. Flexographic printing ink is supplied to fountain 14 at the center thereof by nozzle 19. Conduit 21, having normally closed solenoid operated valve C therein, connects nozzle 19 to the outlet at the bottom of ink reservoir 22.

Upper and lower spray pipes 23, 24 extend parallel to the longitudinal axis of cylinder 11 for substantially the full length thereof. The respective conduits 25, 26 connect pipes 23, 24 to different legs of Y-connector 27. The latter is joined to one leg of T-connector 28, another leg of which is connected through conduit 29 to spray head 30 at the top of reservoir 22. The third leg of connector 28 is connected to the outlet of the section 31 of the wash-up system from which fresh water and a detergent are obtained.

Section 31 includes fresh water inlet 32 connected through manually operated inlet valve 33, pressure gauge 34, and strainer 35 to the upstream end of normally closed solenoid operated fresh water valve G, whose downstream end is connected through normally closed solenoid operated detergent valve S to outlet coupler 36 of section 31. Line 37, having manually operated water bypass valve 38 therein, is connected across the series combination of solenoid operated valves F and G. Line 39, having detergent injector 41 therein, bypasses solenoid operated valve F. The inlet of injector 41 is connected to detergent supply 42. The action of injector 41 is such that when a full head of water flows therethrough, detergent is drawn from supply 42, is mixed with the water, and the mixture is delivered to outlet coupler 36. Thus, when valve F is closed and valve G is open, injector 41 will act to mix detergent with water. However, when both valves F and G are open, the head of water at injector 41 will be insufficient to draw detergent from supply 42 and only fresh water will appear at outlet coupler 36.

Catcher pan 18 is provided with gravity drain 43 connected through line 44 to the inlet of pump 45. The downstream end of conduit 44 is provided with residual water drain line 46 having normally closed solenoid operated drawn valve D therein. The outlet end of pump 45 is connected through solenoid operated inkreturn valve A and line 47 to ink reservoir 22, and the downstream end of valve A is connected to wash water drain line 48 through solenoid operated sewer drain valve E. The upstream end of valve C is connected through solenoid operated ink drain valve B to the inlet of ink drain bucketSl. The upstream ends of both valves B and C are connected through manually operated valve 52 to manual ink drain line 53.

Longitudinally spaced nozzles 56 on upper spray pipe 23 direct fluid from pipe 23 into fountain 14. The lower spray pipe 24 is provided with two sets of longitudinally spaced nozzles 57 and 58. Nozzles 57 direct fluid directly against the lower surface of scraper blade 15 at the nip region along the line of contact between the free edge of scraper blade 15 and periphery of cylinder 1 l. The other nozzles 58 direct fluid against the periphery of rotating cylinder 11 at the region below and in the vicinity of the line of contact between blade 15 and cylinder 11.

Energization of solenoid operated valves A-G takes place in a controlled sequence, established by programmer 60 (FIG. 3). The latter is preferably a stepping drum-type device of a type manufactured and sold by the Tenor Company, 17020 West Rogers Drive, New Berlin, Wisc. A choice of programs is obtained by utilizing selector 61. The latter includes two-position switch 62 for choosing long or short washing cycles and another two-position 63 for placing the doctor blade in its wash or run position. In the wash position doctor an ink film of controlled thickness is formed on cylin-' der 1 l. Selector 61 also includes start and stop control buttons 64, 65, respectively.

The references R-l through R- designate timing periods established by sections of programmer 60. As seen in FIG. 4, timing period R 1 is 80 seconds, and timing period R-5 is 5 seconds. However, programmer 60 is so constructed that when more than one of thetime interval sections is actuated, the timing interval is the sum of the individual intervals. Thus, the drain step 5 la s t for an interval of 15 seconds, obtained by actuating sections R4 seconds) and R-5 (5 seconds). Programmer 60 actuates switches a through g in a predetermined sequence to control operation of valves A through G.

With particular reference to FIG. 4, it is seen that when the short wash cycle is selected, steps numbers 1-3 and 14-23 are selected by programmer 60. Step 1, ink drain, lasts for an interval of 80 seconds, during which scraper doctor blade 15 engages rotating inking cylinder 1 1, pump 45 operates at high speed, ink drain valve B is open, and ink roll supply valve C is open. Thus, ink drains from reservoir 22 into bucket 51 and fountain l4,and ink drains from fountain 14 into pan 18 and through return line 44 to the intake side of pump 45. For step 2, lasting for a 5 second interval during which time section R-5 is actuated, solenoid oper ated valves A, E, F, and G are open. Thus, fresh water passes through open valves F and G and is distributed through the nozzles of spray pipes 23, 24, and thereafter drains-into pan l8 and through line 44 to pump 45 which pumps water through line 47 into reservoir 22, with the excess being pumped through drain line 48.

In the 5 second interval of step 3, timer section R-5 is actuated together with valves B and C, so that the action described in connection with step 1 is repeated, except that dirty water rather than ink is being drained. For steps 14-21, the water and drain steps previously described are repeated except that for steps 1'7-21 doctor blade 15 is retracted from cylinder 11.

i For the drain steps 22 and 23', pump 45 ceases operation and doctor blade 15 continues to be spaced from cylinder 1 1. In addition, the residual water drain valve D is open so that water draining from pan 11 through line 44 does not reach the inlet of pump 45. During step 22 ink return valve A is also open.

Thus, when inks of similar darkness are being changed or when the preceding ink is very much lighter in color than the subsequent ink, within a period of approximately 6 minutes, the inking system is automatically cleaned.

When use of a light color ink is to follow use of a very dark color ink the long wash cycle is utilized. During step 8 of this cycle, detergent bearing water is circulated by having detergent valve F closed and water valve G opened.

Thus, it is seen that the instant invention provides a novel wash-up system for automatically cleaning inking apparatus. As should now be obvious to one skilled in the art, this wash-up system may also be used for apparatus that produces other types of wetted films.

Although there has been described a preferred embodiment of this novel invention, many variations and modifications will now become apparent to those skilled in the art. Therefore, this invention is to be limited not by the specific disclosure herein, but only by the appending claims.

The embodiments of the invention in which an exclusive privilege or property is claimed are defined as follows:

l. The combination comprising apparatus for producing and transferring a controlled film of liquid, and a wash-up means for cleaning portions of said apparatus; said apparatus including an elongated rotatable cylinder having an outer cylindrical surface on which said controlled film is formed, an elongated doctor means adjacent said cylinder, a fountain at least partially formed between and through the cooperation of said cylinder and said doctor means, a reservoir for storing a supply of said liquid, and conduit means connected between said reservoir and said fountain to direct said liquid from the latter to the former; said washup means being constructed so that throughout a washup cycle all elements of said wash-up means are spaced from said cylindrical surface; said wash-up means including a catcher trough positioned below said fountain to catch excess liquid and other material flowing therefrom, first and second nozzle bearing means extending lengthwise of said apparatus for directing cleansing and flushing fluids against said apparatus; nozzles of said first nozzle bearing means directing fluid into said fountain; and nozzles of said second nozzle bearing means directing fluid into the nip region between said doctor meansand said cylinder from a position below said nip region.

2. The combination as set forth in claim 1 in which there are first and second inlets for cleansing and flushing fluids, respectively; power operated control valves for selectively connecting said inlets to said nozzle bearing means; and programmer means operatively connected to said control valves to control operation thereof in a predetermined sequence established for cleaning said apparatus.

3. The combination as set forth in claim 2 in which there is a return line between said catcher trough and said reservoir; and pump means in said return line for selective pumping of liquids and other fluids into said reservoir under the control of said programmer.

4. The combination as set forth in claim 3 in which i there is a means operable to engage said doctor means and said cylinder for intervals of a wash-up cycle during which cleansing and flushing fluids are flowing from said nozzle bearing means.

5. The combination as set forth in claim 3 in which the pump means has an inlet and an outlet; said inlet being on the trough side of said pump means and said outlet being on the reservoir side of said pump means.

6. The combination as set forth in claim 5 in which there is a drain means connected to said return line on the outlet side of said pump means.

7. The combination as set forth in claim 6 in which there is another power operated control valve between the return line and drain means; said another control valve being closed when said pump means is operating, during recirculating intervals of a wash-up cycle con trolled by said programmer, to transfer cleansing and flushing fluids from said trough to said reservoir and back to said fountain through said conduit means.

8. The combination as set forth in claim 7 in which there is a means operable to engage said doctor means 10. The combination as set forth in claim 9 in which the second nozzle bearing means includes some nozzles directing fluid against the underside of said blade.

11. The combination as set forth in claim 10 in which the second nozzle bearing means includes other nozzles for directing fluid against the cylinder at a region below the line of contact.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US194218 *Oct 24, 1876Aug 14, 1877 Improvement in ink-fountains for printing-presses
US2055272 *Dec 7, 1932Sep 22, 1936Adolph WeissRotary intaglio printing
US3486448 *Apr 27, 1967Dec 30, 1969Web Press Eng IncAutomatic blanket cylinder washer
US3658003 *May 29, 1969Apr 25, 1972Johnson Fast Print Mach CorpMethod for washing elements of fabric printing machines
FR94507E * Title not available
FR1517914A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3896730 *Feb 22, 1974Jul 29, 1975Koppers Co IncWash-up system for flexographic printers
US3935836 *Jan 13, 1975Feb 3, 1976Xerox CorporationMetering blade for a fuser roll
US3952654 *Apr 8, 1974Apr 27, 1976Evans Robert EAutomatic blanket wash-up system
US3974768 *Mar 31, 1975Aug 17, 1976Molins Machine Company, Inc.Dual ink circulation and wash-up system for a press
US4050380 *Mar 29, 1976Sep 27, 1977Heidelberger Druckmaschinen AktiengesellschaftInk fountain for printing machine
US4058058 *Feb 26, 1976Nov 15, 1977George Hantscho Company, Inc.Ink fountain for printing presses
US4074627 *Dec 6, 1976Feb 21, 1978Koenig & Bauer AktiengesellschaftApparatus for preventing non-uniform application of ink
US4132167 *Jun 13, 1977Jan 2, 1979Ryobi Ltd.Fluid supply apparatus for blanket cleaning device in offset printing machine
US4230065 *Jul 31, 1978Oct 28, 1980Sunkist Growers, Inc.Apparatus for printing and protecting ink indicia on fruits
US4281597 *Jan 11, 1979Aug 4, 1981Harris CorporationInking mechanism
US4344361 *Apr 19, 1979Aug 17, 1982Baldwin-Gegenheimer CorporationAutomatic blanket cylinder cleaner
US4369214 *May 8, 1981Jan 18, 1983Jagenberg Werke AgProcess and apparatus for preventing hardening of glue on inactive bottle labeling machine
US4369734 *Mar 11, 1981Jan 25, 1983M.A.N.-Roland Druckmaschinen AktiengesellschaftVarnishing assembly in a printing press having self-cleaning feature
US4528996 *Dec 22, 1983Jul 16, 1985The Mead CorporationOrifice plate cleaning system
US4534291 *Dec 13, 1979Aug 13, 1985Sobota James JMethod and apparatus for cleaning printing presses
US4700631 *May 30, 1985Oct 20, 1987Apollo Labeling SystemsInk fountain and ink fountain support for printing press
US4757763 *Mar 6, 1987Jul 19, 1988Baldwin Technology CorporationAutomatic blanket cylinder cleaner
US5165342 *Aug 2, 1991Nov 24, 1992The Langston CorporationEvacuation system for inking chamber
US5224424 *Dec 31, 1991Jul 6, 1993Layland Jon LPrinting press wash-up system
US5325780 *Mar 9, 1993Jul 5, 1994Sakurai Graphic SystemsInk washing device for a printing machine
US5575211 *Jun 30, 1995Nov 19, 1996Hycorr Machine CorporationWashing Arrangement for rotary printer
US5693142 *Mar 25, 1994Dec 2, 1997Nordson CorporationWheel applicator device for applying adhesive, especially to the spines of books during bookbinding
US5806136 *Nov 5, 1996Sep 15, 1998Valmet CorporationDevice in the operation of a doctor in a paper/board machine
US5893327 *Mar 20, 1998Apr 13, 1999Heidelberger Druckmaschinen AgInking unit for a rotary printing press
US5915302 *Sep 16, 1997Jun 29, 1999Mitsubishi Jukogyo Kabushiki KaishaPrinter ink exchange apparatus
US6006666 *Aug 30, 1995Dec 28, 1999Man Roland Druckmaschinen AgMethod and apparatus for erasing the ink-carrying layer from the surface of an image-containing printing form
US6464784 *Dec 22, 1999Oct 15, 2002Eastman Kodak CompanyCoating apparatus having a coating, recirculation and cleaning arrangement
US6571710Feb 18, 2000Jun 3, 2003James F. PriceKeyless inker for a printing press
US6672211Mar 22, 2001Jan 6, 2004James F. PriceInking systems for printing presses
US6883427Nov 25, 2003Apr 26, 2005James F. PriceMethods for applying ink and washing-up after printing
US6895861Jul 11, 2003May 24, 2005James F. PriceKeyless inking systems and methods using subtractive and clean-up rollers
US6951174Apr 15, 2004Oct 4, 2005James F. PricePrinting systems and methods using keyless inking and continuous dampening
US8096237 *Jul 15, 2009Jan 17, 2012Heidelberger Druckmaschinen AgSystem for coating a printing material with a fluid
US8230804 *Oct 5, 2009Jul 31, 2012P&B Construction, Inc.Enclosed chamber, adjustable finish-applicator for flat and dimensional surfaces
USRE35444 *Nov 6, 1995Feb 11, 1997Sakurai Graphic Systems CorporationInk washing device for a printing machine
CN1078533C *Dec 20, 1996Jan 30, 2002温德莫勒及霍尔希尔公司Cleaning method and apparatus for ink knife of printing ink machine set of rotary printing machine
EP0605074A1 *Mar 11, 1993Jul 6, 1994Sakurai Graphic Systems Corp.An ink washing device for a printing machine
EP0650834A1 *Oct 11, 1994May 3, 1995Paper Converting Machine CompanyMethod and apparatus for washing the deck of a press or coater
EP0687563A2 *Jun 6, 1995Dec 20, 1995Bobst S.A.Device for washing the inking means of a rotary printing press
EP0722834A2 *Dec 12, 1995Jul 24, 1996MAN Roland Druckmaschinen AGMethod for cleaning cylinders and rollers of a printing unit of a printing machine
EP0739729A2 *Mar 26, 1996Oct 30, 1996Mitsubishi Jukogyo Kabushiki KaishaPrinter ink exchange apparatus
EP0780228A1 *Nov 9, 1996Jun 25, 1997Windmöller & HölscherMethod and means for cleaning the squeegee device of the inking unit of a rotary printing machine
WO1994022593A1 *Mar 25, 1994Oct 13, 1994Andrew NixonWheel applicator device for applying adhesive, especially to the spines of books during bookbinding
WO2000051817A1 *Feb 18, 2000Sep 8, 2000James F PriceKeyless inker for a printing press
Classifications
U.S. Classification101/425, 101/365, 15/256.51, 118/203
International ClassificationB41F35/00, B41F35/04
Cooperative ClassificationB41F35/04
European ClassificationB41F35/04