US1411268A - Printing press - Google Patents

Description

A. c. CHRISTOPHERSON PRINTING PRESS.

I APPLICATION FI LED DEC.30| I920.

1,41 1,268. Pa ted pr- 4, 1922.

2 SHEETS-SHEET lkzg/ A. C. CHRISTOPHERSON.

PRINTING PRESS..

APPLICATION FILED 050.30.192o.

Patented Apr. 4,1922.

2 SHEET$-SHEET 2- UNITED STATES PATENT OFFICE.

ALFRED C. 'CHRISTO PHERS'ON,"F -MENASHA, WISCONSIN, ASSIG-N'OR TO HACKER MANUFACTURING Co., or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

PRINTING PRESS.

' 1 all whomit may concern:

I Be it known that L ALFREn Cniusro- 7 PHnRso citizen of the' United States, residingat Menash'a, in the county of Winnebago and State of Wisconsin, have, invented a cer 'tainnewrand useful Improvement in Printing Presses, of which the following is a full,

- avoid anyincrease in "theprinting pressure between the printing .members' I further provide means for rendering the printing Clear, concise, and exact description.

My invention relates to printing pressesv that employ complemental printing members at least; one of whichfis in the form of a cylinder, these printingmeinbers being equipped with; bearers which limit the extent to which suchmembers may be approached under the influence of printing pressure exerting means which, in accordance with my invention, is so interrelated with the cylinder, or one of the cylinders if both printing members are cylindrical, as to effect the engagement of such cylinder with the complemental printing member with the 'requisite [pressure required in the printing opera- 'tion. 7 If the printingspace defined by the. contacting bearersshould be too narrowto 4, 'acfcommodate the paperv being printed upon and the printing form or element that are between'the printing members inthe 'printing operation, the aforesaid printing pressure efi'e cting means will yield to permit suchv separation of the bearers that would 7 pressure exerting means functionless for its purpose to enable or permit separation of h .1

operation of the press.

The printing pressure exerting means is preferably in the form of spring mechanism which is effective, in the printing operation, tomovethe printing cylinder member into printing relation with the othermember and to maintain the bearers of these members in contact if the printingform and'the paper being printe d upon together do not exceed the proper printing depth or type height,

the spring mechanism yielding to p'ermitia separation of the bearers if. the aggregate depth of the printing form and the paper being pri'ntedup'on is excessive. By the construction of my invention the printing pressure between the printing cylinder'memv her and the complement'al printing member of a press cannot exceed the printing pressure exerting-force of the spring mechai-nting members in the non-printing I Specification of Letters Patent. Patented 4 ,v 1922, Application filed December 30, 1920. Serial No. 434,030.

nism, the printing cylinder member that is directly influenced by the spring mechanism yielding,.in opposition to the force'of the spring mechanism,if the a regate depth of the printing form and paper is excessive', to ja polnt at whichthe spring mechanism ex erts the printing pressure for which it is designed.

Hitherto. separation between, the bearers of the printing members of a press, due to the pressure thereon ofthe printingfo'rm -matter of the present application is a form of the invention more broadly covered in my copendlng application Serial No. 434,029

filed Dec. 30, 1920'.

I will explain my invention more fully by reference to the accompanying drawings showing the preferred embodiment thereof and in which Fig 1 is a. viewfin side elevation of one form of printing press constructed in accordance withtheinvention; Fig.2

is asectional viewon line 2L2 of Fig. '1;

Fig. 3 is a sectional viewon line 3 31ofFig.

-2-;-Fig.4 is a view looking at oneside of the press showing parts thereof on alarge'r scale, portions being broken away and other por-' tions beingshown in section; and Fig. 5 is' a sectional view on line 5-5 of Fig. 4.

' Like parts are indicated similar charof the frame and assembled therewith by.

means .of the bolts 3. Upright supports 4 carry the rotating shaft '6 o f the printing cylinder 7 these supports finding a substantially fixed axis of rotation for the cylinder in the printing operation and another "fixed axis of rotation for the clinder in I the, non printing-j operation.

The printing cylinder is provided with the usual'bearers 13 at the sides of the press 7 and the bed is provided with the usual bearers 14, also at the sides of the press, upon which the bearers 13 roll as the bed is moved in each printing operation, these bearers, when contacting,defin.ing the normal printing space between the printing members 7 and 10. Coiled springs 15, one upon each side of the press, constitute the preferred means for effecting the desired printing pressure. The'upper end of each of these springs has an abutment 16 fixedly assemh bled with the lower ends of the rods 17 that are themselves fixedly carried by the frame 1 .from which the rods depend, nuts'18serving to clamp the abutment 16 against the larger portions of the rods. The lower end of each spring has a floating abutment 19. A rod 20 is in threaded engagement with the abutment 19, there being also lock nuts21 upon the rod 20 to llOld'thlS rod and the abutment 19 in fixed relation; 1 The upper end of the rodj2O is provided with a nut v '22 engageable with the top of the corresponding'fixed abutment 16. Each ahutment 19 and thecorresponding boltnut 22' are 'so 'spaced apart that when the spring 15 therebetween is effecting printing pressure, during the printing stroke of the bed,

through the elements hereinafter to'be de scribed, the nut '22 will not contact with the abutment '16 but; when the adjustment 1s such that'the cylinder 7 is to be raised for the non-printing stroke of the bed or to separate the printing members at any dosiredtimethe nut 22 will engage the abutment .16to act as a stop to'p'revent the spring from exerting printing pressure'in order that the cylinder 7 may then be raised away fromthe'bed 10.

As illustrated, each spring 15 performs its function through a continuation 23 of the rod '20, this continuation 23 being in snug sliding fit with a verticalopening in the corresponding side' of the frame 1 as is also the corresponding support 4. The upper end'ot each rod continuation 23 is in adjustable threaded connection with "the lower side of the corresponding floating block 24 upon the-same side of the press with the "engaging rod continuation 23. Each floating block 24supports a bearing" '25. A shaft 28 isjou rnaled in both bearings 25. This shaft, in thecase of arhand operated press, is provided with a crank 29 by which the shaft may he turned in. its al gned bearings 25. CO-flXlitl circular elements 30 are formed or otherwisefixed upon and in eccentric relation to each end of the shaft 28 so that the operations effected by the movementsofthe crank 29 upon one other side of the press. 7

For the printing stroke the crank 29 is turned to bring the axis of the eccentrics 30 below the axis of the shaft 28 ,In this side of the press are duplicated upon the v adjustment the upright supports 4; are .de-

pressed by the eccentrics 30 fwith jrespectlto the axis of the shaft28, z'tndtagainst" tl force of the springs 15 whereby the g1 force that is determined by the springs,the

eccentrics 30 serving so to position theslides 24 and the floating abutments 19 connected therewith as to define workingclearances i ng cylinder 7 is pressed toward the comple mental printin'ggmember with a yielding between the abutments or stops 22jand the fixed abutments 16 so as to permitithe springs 15 to exert printing pressure to an extent that is limited only by the: bearers l3 an'd l l or by the printing form and paper passing or interposed between theprinting The spring effected printlng' members.

pressure is maintained during the printing stroke ofthe printing bed 10 thatis effect ed during the rotation of the cylinder 7 one direction and through the intermediation of the spur'gear 35 co-raxial with said cylinder and the rack 36 fixed upon one side of the printing bed. During the non-printraised 'sufliciently to separatelthe bearers 13 andlafln accordance with common p; c-

"r00 ing stroke of the bed the cylinderis tojbe tice. The extent to which the cylinder] is 7 raised is insufiicienttouncouplethegear' elements and 36st) that when tlie :cyl der 7 1s reversely' rotated in the non-q .ing stroke the bed 10 may be moved in opposite direction from that "1n avh cl 'itp was moved in the printing stroke] (lei-to raise the cylinder.- 7 .for'jthe nonprinting stroke the crank 29 is me raise the eccentrics SO. I In the first the raising movement otthese eccentrics the "bolt nuts 22'ar'e engaged. with the top sides" of the abutments 16. lVhen these bolt nuts have engaged these abutinents the springs 15 can no-longer function to exert downward pressure upon the blocks 24: so'that, uponcontinuation of the eccentric raislng movement of the crank 2 9, the upright supportse will'be raised from the bed' l Ofonly to Such anvfiXtent that the gear elemen and 36 will not be unmeshed but to tent which will secure the desired sop;

tion of the bearers ltra'nd 215 i tenths-nonp t s e n-v I 'The spacing between the bolt nuts 22 and the abutment 1 6, that i Present when the,

springs 15 are performing their function, is

trics '30 that said bolt nuts will encounter the abutments "16 during'the first small portion of the cylinder raising'movement of the crank 29 so thatupon'further movement of this crank the eccentrics 30 may function to raise. the cylinder 7 unopposed by the action of the spring;

' It will be observedirom the foregoing description that the. spring mechanismjis adjust'able to determine the degree of printing pressurethat is to be exerted thereby whereby such pressure may be suited to the character of the printing to be performed and the nature of the printing elements employed.

larly described the preferred embodiment of my invention I do not wish to be limited to I printing pressure exerting meansoperating uponsaid cylinder to maintain the bearers in contact during the printing operation and permitting separation of the engaging bearers to prevent undue increase of the printing pressure; and means for separatingthe engaging bearers. 1

2. A printing'press including two printing members one of which is a rotatable cylinder mounted to be movable toward and from the other member and to have a substantially fixed axis of rotation while printing, each printing member being provided with bearers engaging the bearers upon the other; printing pressure exerting means operating upon said cylinder to maintain the 'bear ers in contact during the printing operation.

and permitting separation of the engaging bearers to prevent undue increase of the printing pressure; and means for separating the engaging bearers and for then depriving the printing pressure exerting means of its function.

3. A printing press including two printing members one of which is a rotatable cylinder mounted to be movable toward and-- from the other memberand to have asubstantially'fixed axis of rotation-while print ing, each printing member being provided with bearers engaging the bearers upon the.

. other; printing pressure exerting springmeans operating upon said cylinder to While I have herein shown and particumaintain the bearers in contact during the printing operation and permitting separation o1 the engaging bearers to prevent un due increase of the printing pressure; and

means for separating the engaging bearers.

4. printing press including two printmg members one of which is arotatable cylinder mounted to be movable toward and from the other member and to have a substantially fixed axis of rotationwhile print- 1 1g, ach print ngmember being provided with bearers engaging the bearers upon the other; printing pressure exerting spring means operating upon said cylinder to maintain the bearers in contact during the printing operation and permitting separation of the engaging bearers to prevent undue increase of the printing pressure; and means for separating the engaging bearers and for then depriving the printing pressure exerting means of its function.

5. A printing press including two print ing members one of which is a rotatable cylinder mounted to be movable toward and from the other member, which is in the form of areciprocating bed, and to have a substantially fixed axis of rotation while printing, each printing member being provided with bearers engaging the bearers upon the other; printing pressure exerting means operating upon said cylinder to maintain the bearers in contact during the printing opera- 'tion and permitting separation of the engaging bearers to prevent undue increaseofthe printing pressure; and means for separating the engaglngbearers.

6. A'printing press including two print-' ing. members one of which is a rotatable cylinder mounted to be movable toward and from the other member, which is in the form of a reciprocating bed, and to'have a sub stantially fixed axis of rotation while printing, each printing member being provided with bearers engaging the bearers upon, the other; printing pressure exerting means operating upon said cylinder to maintain the bearers in contact during the printing operation and permitting separation of theengaging bearers to prevent undue increase of the printing pressure; and means for separating thev engaginghbearers and for then stantially fixed axis of rotation while. printing, each printing member being provided with bearers engaging the bearers upon the other; printing pressure exerting spring means operating upon said cylinder to maintain the bearers in contact during the printing operation and permitting separation of depriving the printing pressure exerting the engaging bearers to prevent undue in crease of the printing pressure; and means for so aratin the en a in bearers. i b b 8., A printing press including tWo printmg members one of Which is a rotatable cyllnder .mounted to be movable toward and from the other member, which is in the form of a reciprocating bed, and to have a substantially fixed axis of rotation While printing, each. printing member being provided With bearers engaging the bearers upon the other;

printing pressure exertingspring means opprinting pressure; 7 and means for separat-V ing the engaging bearers andvfor then depriving the printing pressure exerting means of its function. r I V p In Witness whereoflI hereunto subscribe my name this'24'th day of December A. D,

ALFRED C, CHRISTOPHERSONv

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