US1174001A - Inking device for printing and marking machines. - Google Patents

Description

W. P. EGAN & J. J. SHEEHAN.

INKING DEvIcE'FoR PRINTING AND MARKING MACHINES.

APPLICATIONv FILED JUNE 28,'1913.

ZzUen-rsf www?. Z

fm1.. @ZA/w THE COLUMBIA PLANUGRAPH cn.. WASHINGTON. D. c.

W. P. EGAN &1. I. SHEEHAN.

INKING DEVICE FOR PRINTING AND MARKING MACHINES.

APPLlcATloN FILED JUNE 28.1913.

Patented Feb. 29, 1916.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

WILLIAM P. EGAN AND JOHN J. sHnEAHAN, or" LYNN, MASSACHUSETTS.

INKING DEVICE FOR PRINTING AND MARKING- MACHINES.

Speccation of Letters Patent.

Patented Feb. 29, 1916.

Application filed .Tune 28, 1913. Serial No. 775,458.

and Marking Machines, of which thek yfol-k lowing is a specification.

This invention relates to improvements in inking devices for printing and marking machines and its `principal object is to provide means whereby an ink pad of the lusual type may be shifted at intervals to permit the type to engage different portions ofthe surface of the pad thereby obtaining greater efficiency and economy in the distribution of the ink. In this device the wearis distributed more evenly over the surface of the pad, consequently the pad can be used .for a longer time than in the usual method of inking.

Mechanism is herein provided for auto- Inatically shifting the position of the pad by a step movement at each. impression of the type and for automatically` reversing the direction of the movement at regularA intervals, Y Y

In the accompanyingl drawings isillustrated a form of construction embodying,l

thisinvention, in which,.- j v n Figure 1, is a side elevation .of the device showing the same in operative connection with and inking the type'of the usual print'- ing and markingk machine. Fig. 2, is a rear elevation of a portion of Fig. 1 showing the mechanismA controlling the ink pad. Fig.` 3, is a side elevation of Fig; 2, looking in the direction indicated by the arrow. Fig. 4;,

is a detail plan lview ofthe mechanism for reversing the movement yof the ink pad.

. Like characters of reference refer to like parts in the several views.

Referring to Fig. 1, 1 represents the frame of a kprinting and marking machine having journaled` in the lowerportion thereof the rock-shaft 2 carrying the arm .4: secured thereto by theset screw 5 and Vcarrying on the outer end thereof the usual type-head 6. Journaled in the upper part of the frame 1 is a rock-shaft 3 which carries mounted/on the outer end thereof an arm 7 carrying a holder 25 and ink-pad- 24 reciprocally mounted on the guide rods 26 whichV coperate with grooves in theV bottom. of the holder. 27 is a pinion screw being externally threaded into the lower part of the arm 7 and'carrying thev screw 28 internally threaded thereln, the outer end of said screw 28b'eing pinned at 29 to the pad holder 25.

A movement of the pinion ineither direction operates this compound screw actuating thek padholder 25 and pad-24 in its respective direction. This permits the type on typehead to engage the ink-'pad 24 at different pointsof contact thereon at each inking operation as shown in Fig. 1 and hereinafter described.

The arm 7 has an elongated slot S fitting over Vshaft 3 permitting a slight adjustment of the length of the arm 7 by means of the thumb screw 9 thereby allowing the pad )A to engage the type on typehead 6 at a suitable adjustedy pressure. The arm 7 is held in adjusted position on the shaft 3 by means of alcap l0 which'has a key shaped portion which is splined in a groove in said arm 7. The cap 10 is vsecured, in position on the shaft 3 by a set screw l1. This spline arrangement readily permits the lowering orfraising of the arm 7 by means of the thumb screw 9 at the same time holding the arm 7 in position.l

, A plunger 141 is reciprocally mounted in the'groove 20 in Vthe arm 7 and is held in position therein on one side by the plate 14a screwed yto said arm and by the cam 12 whichis loosely mounted onsaid arm 7 and adjustable over the shaft Cani 12`is held in'adjusted position by means of a screw 17 (see Fig. which is threaded into the framel, the slot 18 permitting a slight vertical adjustment of said cam and preventing the same from turning. The pin 15 driven through the plunger 14 carries on one end a roll 16 held in position-within the cam `track 13 by means -of a pin 16a.

On lthe opposite end of the pin 15 is a roll 19a which is adapted to operate in the slot 19 causing theplunger 14, when the arm 7 is oscillated to be yreciprocated during the movement of said arm. 'This reciprocation operates a'v link 21 which ispivoted to Vthe plunger 14 at 22 and moves a compound pawl 31 which is pivotally mounted on thev stud 23 on the lower end of the 'link 21.

32 is a plate pivoted over the sleeve 33 and carries `pivotally mounted therein the opposite end of the stud 23. A projection 34 dependingy from they plate 32 carries a latch 35 pivoted thereto and which is adapted to engage either the upper or lower bev-y eled surfaces of the compound pawl 31. A

spring 36 secured at one end to a pin 37 on plate 32 and at its opposite end to a pin 38 on latch 35 serves to hold said latch 35 in a position in contact with either of the beveled surfaces of the compound pawl 31 until the said pawl is shifted in a manner to be hereafter described. Y Y

A shifting plate 39 is mounted over the stud 23 and securely pinned to the compound pawl 31, both being held on stud 23 by a pin 40 extending through said stud. The

plate 39 carries two fingers 41 and 42, the

lower finger1 41 being offset from the plane y of the upper finger 42.

A pinion 30 intermeshes with a pinion 27 and is loosely mounted over the sleeve 33, said pinion being held in position by the shifting plate 39.

43 is a rod secured at one end by a pin 44 to the pad holder 25 and is adapted to move within the sleeve 33 simultaneously with the movement of the pad holder 25. This rod 43 carries on its extreme outer end a finger 45 and intermediate said finger 45 and said pad holder 25 another finger 46 adapted to reciprocate within a slot 47 in sleeve 33.

A flat spring 48 secured at one end by a screw 49 to the lower part of the arm 7 is indented at its free end and adapted to fall into position between the teeth of the pinion 30 as the same is actuated step by step by the compound pawl 31. The upper pawl 50 actuates the pinion 30 in one direction while the lower pawl 51 when thrown into action reverses the movement of the pinion.

The operation of the device is as follows: Prior to each impression of the type upon the article to be marked, the rock shaft 3 oscillates and moves the arm 7 to the position shown in Fig. 1, when the arm 4 moves the type on the type-head 6 into contact with the inking pad 24. The arm 4 is then moved through the medium of the rock shaft 2 away from the ink pad 24 allowing the arm 7 to withdraw the pad 24 from out of the path of the type-head 6 when the same de-y scends to make an impression. The type in Fig. 1 is shown in contact with the middle of the pad 24 and,.in thel ordinary method of inking, is in continuous contact with the center of the pad causing a depression to be formed in the same place thereby wearing out the pad and also failing to use but a small portion of the ink in the pad. In this device the pad is shifted step by step at each inking operation. Prior to the pad 24 engaging the type, the cam roll 16 simultaneously with the upward movement of the arm 7, rises in the cam track 13 raising the plunger 14 and through link 21 (see Figs. 2 and 3) lifts the pawl 50 which engages one of the teeth of the pinion 30 moving said pinion one tooth forward until the spring 48 settles into position holding the pinion in its adiusted position. rlhis movement acts through pinion 27 and compound screw 28 to move the holder 25 and pad 24 a slight distance inward. VVhenthe type has been inked and the arm 7 is withdrawn, the roll 16 reciprocates the plunger 14 and through link 21 drops the plate 32 and pawl 50 over the following tooth in the pinion 30 then resuming its normal position. This movement is repeated at each inking operation, the kpad 24 gradually moving inward step by step, exposing a fresh inking surface to the type at each inking operation, until it has reached a position where the finger 46 on rod 43 intercepts the finger 42 during the downward movement of the link 21 causing the pawl 31 to be thrown backward with the latch 35 engaging its upper beveled surface. This throws the pawl 50 out of operating contact with the teeth of pinion 30 and throws the pawl 51 in position to actuate the pinion 30 in the opposite direction at the neXt inking movement thereby reversing the' direction of travel of the pad 24 through the action of screw 28 turning in the opposite direction. The pad 24 now continues this outward step movement until the finger 45 on rod 43 moves into the path of and intercepts the offset finger 41 on the next upward movement of the plate 32 again shifting thek compound pawl 31 to the position shown in Fig. 2. This step movement and reversing of thev pad 24 is continued in the manner heretofore described thereby exposing a fresh surface of the pad to the type at each inking operation.

Having thus described our invention and set forth a construction embodying the same, what we claim as new and desire to secure by vLetters Patent of the United States, is:

1. In an apparatus of the character described, the combination with a swinging type-head of anoscillating holder, an inking pad movably mounted in said holder and adapted to ink the type for each impression, and automatic mechanism adapted to operate upon each oscillationk of said holder to shift the pad to change the line of contact.

of the type thereon with each impression.

2. In'an apparatus of the characterdescribed, the combination with a swinging type-head of an oscillating holder, an independently operating inking pad movably mounted in said holder and adapted to ink. the type for each impression, and mechanism adapted to operate upon each oscillation of said holder for intermittently reciprocating said pad to change the point of contact of the type thereon with each impression.

3. In an apparatus of the character described, the combination with a type-head of an oscillating holder, a swinging pad movably mounted in said holder and for inking the type for each impression, means for imparting a step movement to said pad in one direction at. each oscillation of said holder, and mechanism for reversing the step movement of said pad at varied intervals thereby changing each position of contact Aof the type thereon.

4. In an apparatus of Vthe character described, the combination of a type-head of an oscillating holder carrying a pad Jfor'inking the type, automatic means for shifting the position of the pad in the holder in one direction at each oscillation of said holder, and means Jfor shifting the position of the pad in the opposite direction at pre-determined intervals.

5. In an apparatus of the character described, the combination with a swinging type-head of an oscillating holder, a movable pad mounted in said holder for inking the type for each impression, and automatic means at each oscillation of said holder for changing the point of contact of the type with said pad in one direction on said pad, and for reversing the direction on said pad whereby the entire inking surface of said pad is utilized.

6. yIn an apparatus of the character described, the combination with a type-head of an oscillating holder, a movable pad mounted in said holder adapted to ink the type for each impression, and means adapted to be operated at each oscillation of said holder to adjust the position of the pad to change the point of contact of the type thereon.

7. In an apparatus of the character described, the combination with a swinging type-head of an oscillating holder, a swinging holder, a reciprocating pad mounted in said holder and adapted to ink the type for In testimony whereof we have affixed our signatures, in presence of two witnesses.

WILLIAM P. EGAN. JOI-IN J. SHEEHAN.

Witnesses:

LoUIs Gr. BARTLETT, FRED. L. NoRRIs.

Copies of this patent may be obtained for five cents each, by addressing` the Commissioner of Patents, Washington, D. C.

Images