US2591613A - Inking mechanism for printing presses - Google Patents

Inking mechanism for printing presses Download PDF

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Publication number
US2591613A
US2591613A US745693A US74569347A US2591613A US 2591613 A US2591613 A US 2591613A US 745693 A US745693 A US 745693A US 74569347 A US74569347 A US 74569347A US 2591613 A US2591613 A US 2591613A
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Prior art keywords
pawl
press
fountain
ratchet
bed
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US745693A
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William C Rupp
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Chandler and Price Co
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Chandler and Price Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F1/00Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed
    • B41F1/26Details
    • B41F1/40Inking units
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/15Intermittent grip type mechanical movement
    • Y10T74/1558Grip units and features
    • Y10T74/1577Gripper mountings, lever
    • Y10T74/1581Multiple acting

Description

April 1952 w. c. RUPP INKING MECHANISM FOR PRINTING PRES-SE5 Filed May 5, 1947 3 Sheets-Sheet l INVENTOR. W/L L IAM C. RUPP April 1, 1952 w. c. RUPP INKING MECHANISM FOR PRINTING PRESSES 3 Sheets-Sheet 2 Filed May 5, 1947 INVENTOR. fiv /LL/AM c. reu p 6564A; 4 r j/m [n04 P 1952 w. c. RUPP INKING MECHANISM FOR PRINTING PRESSES 3 Sheets-Sheet 15 Filed May 5. 1947 Jig. /Z
INVENTOR. m4. L 1AM. c. 1e upp ATTonA/E VJ.
Patented Apr. 1, 1952 INKING MECHANISM FOR PRINTING PRESSES William C. Rupp, Parma, Ohio, assignor to The Chandler & Price Company, Cleveland, Ohio,
a corporation of Ohio Application May 3, 1947, Serial No. 745,693
7 Claims.
This invention relates, as indicated, to an improved inking mechanism for printing presses, and more particularly to inking mechanism which is particularly adapted for platen printing presses of the so-called Gordon type. It will be understood, however, that the inking mechanism of this invention may be employed with other types of printing presses where a form is to be inked by transfer of ink from a suitable fountain or like source spaced from such form.
In such presses the ink is customarily transferred from the fountain onto a distributing disk or plate by means of rollers which travel backand forth across the latter and the ink is then in turn transferred from such disk or plate to the form by the same or a. second similar set of rollers. Various rather elaborate devices for supporting the fountain and fountain roller have been employed in the past and means provided to regulate the amount of ink taken by such fountain roller from the fountain. Thus, it is ordinarily desirable that when the press is in throw-01f position the fountain should cease to supply ink to the inking rollers inasmuch as the press will not be printing and an excessive amount of ink would otherwise be applied to the form- It is, however, occasionally desirable that the fountain should continue to operate even when the press is in throw-off position, as'when making ready the press for printing, since it may take fifteen minutes or more'of operation to obtain proper distribution of the ink on the rollers, disk, and form.
It is, therefore, a primary object of my invention to provide an improved and simplified support for the fountain which will comprise relatively few parts and will be easy to maintain and adjust.
Another object of my invention is to provide improved means for regulating the contact of the ink distributing rollers with the fountain roller.
Still another object is to provide means adapted automatically to stop the operation of the fountain roller when the press is shifted into throw-off position.
A further object is to provide means whereby the operator may adjust such fountain roller operating means to continue operation even when the press is in throw-01f position, when so desired. Other objects will become apparent as the following description proceeds.
To the accomplishment of the foregoing and related ends, said invention, then, comprises the features hereinafter fully described and particularly pointed out in the claims, the following description and the annexed drawings setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the principle of the invention may be employed.
In said annexed drawings:
Fig. 1 is a side elevational view of a platen printing press showing my new inking mechanism mounted thereon;
Fig. 2 is an enlarged fragmentary view of the bed of such press showing the inking mechanism in greater detail;
Fig. 3 is a rear elevational View of such inking mechanism;
Fig. 4 is a top plan view of a portion of the mechanism illustrated in Fig. 3;
Figs. 5 and 6 are detail perspective views of the two ratchet members included in such mechanism;
Fig. 7 is a fragmentary view of such mechanism illustrating the operation thereof when the press is printing;
Fig. 8 is a view corresponding to Fig. 7 showing the action of such mechanism when the press is in throw-off position;
Fig. 9 is an elevational view partly in section showing the adjustable supporting means for the inking mechanism;
Fig. 10 is a detail view of a portion of such supporting means; and
Figs. 11 and 12 are end and side elevational views respectively of the locking element comprising a part of such supporting means.
Referring now to said drawings, and especially Figs. 1 and 2 thereof, the bed I of the press in the face 2 of which the form (not shown) is adapted to be secured is pivotally mounted at its lower end about an axis 3 in the main frame 4 of the press. Oscillation of bed I toward and away from the main frame of the press is obtained by means of connecting rods or side arms 5, one on each side, which are attachedat one end to cranks 6 on a rotating part 1 of the press and at the other end to the corresponding ends of a shaft 8 which extends transversely through the bed. The last-named connections include eccentrics, by oscillation of which the bed may be displaced sufficiently so as to 'preventthe form from coming into contact with the platen 9. such shifting of the eccentric connections just referred to being effected in the usual manner. by throw-off means, including hand lever Ill and inter-connected links and levers ll, I2, l3, l4, and I5. I
Also oscillatorily mounted on shaft 8 are roller frames l6, one on each side of the bed,which carry form rollers I! which are mounted in the usual manner in the forward portion of such frames. Oscillation of frames I6 is produced in the usual manner, as the bed I rocks back andv forth, by means of a link l8 connected at one end to a pivot I9 spaced from axis 8 and at the other end to a fixed pivot 20 on the main frame ofthe press.
An ink distributing plate or disk 2| is mounted for rotation in a bracket 22 which projects upwardly from bed Ink distributing rollers 23 and 24 together with vibrating roller 25 are mounted in carriages consisting of side frames 25. Such carriages are provided with spaced rollers 21 and 28 travelling in outwardly facing channel guide-ways 29. Reciprocation of such carriages, and thereby of the ink distributing rollers across disk 2|, is obtained by means of link 30 pivotally connecting one of such carriages to a boss 3| on side frame member 16. Rollers 23 and 24 are provided with truck wheels on their respective ends which are adapted to run on tracks 32 disposed in parallel relation one on each side of disk 2|, these tracks continuing as curved sections 33 which then extend downwardly alongside the face of bed I in which the form is secured. Ther is thus formed a continuous track-way from a point adjacent the upper or rear edge of the disk to a point lying below the lower edge of such form so that form rollers l1 may travel upwardly along such track-way and across the ink distributing disk 2| after a film of ink has been transferred thereto by distributing rollers 23 and 24. 9
To assist in the even distribution of ink on the disk by such rollers means may be provided for imparting a step-by-step rotative movement to the disk. An suitable means may be employed for this purpose, such as that shown and describe in Patent No. 2,079,172 to L. R. Johnson et 211., dated May 4 1937.
The ink fountain with which this invention is primarily concerned comprises spaced side members 34 with fountain roller 35 journalled therebetween. A flexible blade 36 is adjusted by hand screws 31 to regulate the amount of ink taken up by roller 35. Sid frames 34 are carried by arms 38 pivotally mounted at 33 in brackets 40 secured to upwardly extending portions 22 of the bed. Side members 34 are also connected to extensions of brackets 40 by means of a pair of links each comprising an adjusting screw 4| adapted to be locked in adjusted position by nut 42. The upper ends of such screws are threadably engaged in bosses 43 pivotally mounted on a shaft between side members 34 and at their lower ends ar threadably engaged in bosses 44 pivotally mounted on eccentric shaft 45 journalled in brackets 40. One such boss 44 is provided with two spring-backe plungers 45 and 41 adapted. to engage in recesses 48 in annular knurled hand control 49 secured to shaft 45 by means of set screw 50.
It will be seen from the foregoing that the fountain as a whole may be elevated or lowered by turning screws 4| thereby to adjust the position of fountain roller 35 to obtain proper contact between such fountain roller and ink distributing rollers 23 and 24. By turning hand knob 49 eccentric shaft 45 may be rotate to obtain a final delicate adjustment even during operation of the press.
Shaft carrying fountain roller 35, extends laterally of the fountain and, is provided with two ratchets 5'2 and 53 keyed thereon. To the end of such shaft is aflixed a hand-wheel 54 by means of which the fountain roller may be manually rotated when desired. Pivotally mounted on shaft 5| intermediate such wheel and ratchet 53 is a link 55 in which is journalled a small shaft 56. A dog or pawl 51 is secured to such shaft by means of a set screw and is adapted. to engage with either ratchet 52 or 53 according to the lateral position of the shaft (see Fig. 4). Such shaft and the pawl secured thereto may be laterally shifted to bring such pawl into position to engage the selected ratchet by raising the pawl as shown in dotted line in Fig. 'I so that the shoulder on such pawl avoids stop 58. When the pawl is in operating position as shown in solid line it thus cannot become accidentally displaced. A long link 59 pivotally connects the end of link 55 and frame I5 eccentrically of the axis of oscillation of such frame.
The principle of operation of such mechanism will now be evident. Ratchet 52 is provided with a greater number of teeth (in this case seven) than ratchet 53 (shown with six teeth). When the press is operating, pawl 51 will ordinarily be set to ngage ratchet 53, the movement imparted to such pawl by frame l6 and links 59 and 55 being just suflicient to cause such engagement (see Figs. 2 and 7). Fountain. roller 35 will thus be turned through one-sixth of a revolution for each impression. When the throw-off mechanism is operated, bed I no longer oscillates through the same are and the pawl 51 is not reciprocated far enough to engage the next tooth on ratchet 53 (see Figs. 1 and 8), so that fountain roller 35 now ceases to turn. When the throw-off is released and printing recommences the pawl will again engage ratchet 53 and operat the fountain roller as before.
As above indicated, it is occasionally desired to operate the fountain even when not printing, as when making ready, and the pawl may then be shifted to engage ratchet 52. Since this ratchet has a larger number of teeth but is of the same diameter the pawl will continue to engage the same despite the reduced reach of the pawl when the press is in throw-off position. It may obviously also be used during printing, if desired, when there will be somewhat more lost motion and the fountain roller will be turned only one-seventh of a revolution instead of one-sixth when ratchet 53 is employed.
It will be apparent that ratchet 52 may be provided with a large number of teeth, the only effect on shifting the press into throw-off position being to reduce the number of teeth included in a single stroke of the pawl and accordingly somewhat reduce the extent of rotation of such pawl and fountain roller. Also, since it is the circumferential spacing of the ratchet teeth which determines engagement or non-engagement by the pawl, two ratchets of different diameters may be employed with any appropriate number of teeth.
It will be seen from the foregoing that I have provided novel inking mechanism for printing presses which is relatively simple in construction but sensitively adjustable to meet the pressman's needs.
Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims, or the equivalent of such, be employed.
I therefore particularly point out and distinctly claim as my invention:
1. In inking mechanism for platen printing presses, a fountain including a fountain roller, means pivotally connecting said fountain to the bed of the press, and means operative to adjust the position of said fountain about said pivotal connection comprising adjustable supporting means on the bed of such press for said fountain, said supporting means including longitudinally adjustable link means pivotally connected to said fountain at its upper end and pivotally connected to an eccentric carried by such bed at its lower end, and means operative to rotate said eccentric and hold the same in selected rotative position.
shiftably mounted selectively to drive one of said ratchets, and link means operative to reciprocate said pawl, said link means being connected to the bed of such press for operation by oscillation of such bed, whereby when such press is shifted into throw-off position in conventional manner and the arc of oscillation of such bed accordingly altered, the distance said pawl is reciprocated will likewise be altered, said link thereupon being operative to reciprocate said pawl a limited distance only enabling operative engagement of said pawl with said ratchet having the teeth of lesser circumferential spacing but insufiicient to enable operative engagement with said ratchet having the teeth of greater circumferential spacing.
3. In inking mechanism for platen printing presses including a fountain and a fountain roller, means operative to rotate such roller comprising two ratchets respectively having teeth of different circumferential spacing, a pawl selectively operative to drive either one of said ratchets, and means operative in response to shifting of such press into non-printing position effective to reduce the reach of said pawl to an extent still enabling operative engagement of said pawl with said ratchet having the teeth of lesser circumferential spacing but being insufficient to enable operative engagement with *said ratchet having the teeth of greater circumferential spacing.
4. In inking mechanism for platen printing presses including a fountain and a fountain roller, means operative to rotate such roller comprising two ratchets of substantially equal diameter but having a different number of teeth, a pawl selectively operative to drive either one of said ratchets and means operative in response to shifting of such press into non-printing position effective to reduce the reach of said pawl to an extent still enabling operative engagement of said pawl with said ratchet having the greater number of teeth but insuflicient to enable operative engagement with said ratchet having the lesser number of teeth.
5. In inking mechanism for platen printing presses including a fountain roller, means operative to rotate such roller comprising a ratchet, a pawl operative to drive said ratchet and adapted to remain continually in contact therewith in all positions of the press, an oscillatable side frame member adapted to carry the form rollersof the press, said side frame member being oscillatably mounted on the bed of such press, eccentric press throw-off means in said bed operative to alter the arc of oscillation of such bed and of said side frame member whereby such press may be shifted into non-printing position, and link means connected to said side frame member and to said pawl operative normally to reciprocate said pawl to drive said ratchet in response to oscillation of said side frame member during operation of such press, said link means being connected to said side frame member closely adjacent said eccentric throw-off means and said throw-off means thereby being operative to modify the action of said link means substantially to reduce the effective reach of said pawl.
6. In inking mechanism for platen presses having a main frame, a bed member mounted for oscillation toward and away from such main frame, a roller frame pivotally mounted on such bed member for oscillation relative thereto, a link pivotally interconnecting such main frame and roller frame operative thus to oscillate the latter toward such main frame when such bed member is rocked away from such main frame and away from such main frame when such bed member is rocked toward such main frame, throw-off means operative to shift the arc of oscillation of such bed member away from such main frame and thus correspondingly to shift the arc of oscillation of such roller frame relative thereto, a fountain roller carried by such bed member above such roller frame, a ratchet adapted to turn such fountain roller, and a pawl adapted to drive such ratchet; a link pivotally interconnecting such roller frame and pawl adapted to reciprocate the latter in response to such oscillation of such roller frame, the point of pivotal connection of said latter link to such roller frame being located closely adjacent and above such pivotal mounting of the latter when such roller frame has been thus oscillated toward such main frame, whereby the arc of oscillation of such point will be shifted toward such main frame and the extent of reciprocation of said latter link will be accordingly reduced when such bed member is in throw-off position, thus reducing the throw of said pawl, and the spacing of adjacent teeth of such ratchet being only slightly less than the throw of such pawl during normal oscillation, and press throw-off means operative to shift the arc of oscillation of the point of pivotal connection of said link and frame member and thereby reduce the extent of reciprocation of said link and therefore of such pawl. the spacing of adjacent teeth of such ratchet being less than the throw of such pawl during normal operation of such press but greater than such throw of such pawl as thus reduced.
WILLIAM C. RUPP.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 258,290 Gage May 23, 1882 1,159,860 Niles Nov. 9, 1915 1,352,159 Tyler Sept. '7, 1920 1,571,882 Bechman Feb. 2, 1926 1,873,235 Wood Aug. 23. 1932 1,992,613 Hartley Feb. 26, 1935
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821917A (en) * 1953-12-30 1958-02-04 Schnellpressenfab Heidelberg Automatic platen printing press

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US258290A (en) * 1882-05-23 Ine fountain
US1159860A (en) * 1914-04-07 1915-11-09 Hoe & Co R Inking mechanism.
US1352159A (en) * 1919-04-23 1920-09-07 Chandler And Price Company Inking mechanism for printing-presses
US1571882A (en) * 1924-02-04 1926-02-02 Duplex Printing Press Co Inking mechanism for printing presses
US1873235A (en) * 1926-05-26 1932-08-23 Wood Newspaper Mach Corp Inking mechanism
US1992613A (en) * 1930-06-06 1935-02-26 Addressograph Co Printing machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US258290A (en) * 1882-05-23 Ine fountain
US1159860A (en) * 1914-04-07 1915-11-09 Hoe & Co R Inking mechanism.
US1352159A (en) * 1919-04-23 1920-09-07 Chandler And Price Company Inking mechanism for printing-presses
US1571882A (en) * 1924-02-04 1926-02-02 Duplex Printing Press Co Inking mechanism for printing presses
US1873235A (en) * 1926-05-26 1932-08-23 Wood Newspaper Mach Corp Inking mechanism
US1992613A (en) * 1930-06-06 1935-02-26 Addressograph Co Printing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821917A (en) * 1953-12-30 1958-02-04 Schnellpressenfab Heidelberg Automatic platen printing press

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