US2002321A - Rotary duplicator - Google Patents

Description

May 21, 1935.

L. KLUITMANN ROTARY DUPLICATOR Filed Jan. 17, 1935 2 Sheets-Sheet 1 P m o a PM l K o e L y 1935. 1.. KLUITMANN 2,002,321

I ROTARY DUPLIGATOR Filed Jan. 17, 1935 2 Sheets-Sheet 2 Inventor:

Patented May-21, 1935 I v Q UNITED STATES PATENT OFFICE Leo Kluitmann, Dusseldorf, Germany.

Application January 17, 1935, Serial No. 2,185 In Germany August 10,1931

'5 Claims. (Cl. 101132) This invention relates to a device for printing The rack carries on its toothed part a rider 2 on sheets. which is adjustable in the longitudinal direction It has been proposed already to change the of the rack I. The rear end of the rack is conform in duplicating machines automatically nected with the end of a spring 5 which in the 5 without stopping the machine by actuating a represented embodiment is a spiral plate spring 5 lever, etc. for moving the form resting on a feedor drum spring as it is used in type-writing maing table towards the printing drum to bring it chines and which has the advantage that it may within ranges of a gripping device secured to the be widely extended and needs only a minimum of drum. By means of a cam, a lever arm arranged space. The spring 9 is mounted on a pin or screw 10 on the printing drum is controlled to open the bolt 3| secured to a bracket 30 of the machine 10 gripping device during the same operation, so frame. At each rotation of the printing drum 2| that the previously fixed form drops out and the the rack is displaced step by step by thetooth new form is held on the drum after the lever arm 3 rotating with the drum 2| and engaging each has passed the cam. time the toothed part of the rack. The pawl 4 According to the invention, the control of the pivotally mounted on the machine frame holds 15 device for changing the form is to be efiected the rack I in the position attained by means of automatically after a certain number of copies the tooth 3 against the pull of the spring 9. A have been made. It isknown to print'a plate or control lever 5 is pivotally mounted on a pin ll stencil in addressing machines several times and in the side wall |3 of the machine frame and prothen to change it automatically, but these known vided with a sprin 1 at its e e the Said 20 devices are, as a rule, required to reprint only a, spring being secured at 36 to the machine frame. very limited number of addresses and are not Near the said end of the lever 5 a pin 5a is arsuited for duplicators, in which the form has to be ranged. A stop lever'G pivotally mounted on the changed only after a larger number of copies has machine frame and provided with a nose 6a is been printed, which fluctuates considerably. held in engagement with the pin 5a of the con- 25 Furthermore, the changing of paper forms in trol lever 5 and against an abutment pin 3'! of duplicators differs essentially from changing the machine frame by means of a spring l2 sestencils in addressing machines. cured at 29 to the machine frame. The lower According to the invention, the change is efend of the said stop lever lies in the path of the 30 fected by means of arack which at each rotation rider 2 of the rack I. After the drum 2| has 30 f the printing drum is moved by a tooth romade the number of revolutions fixed by the adtating with the drum. This is continued until justment of the rider 2 the latter abuts the stop a rider adjusted on the rack moves a two-armed lever 6 and moves the same about its pivot 38, 'stop lever securing a spring-urged second lever so that the nose 6a of the stop lever B releases the for the automatic change of the original out of pin 5a of the lever 5 and the spring '1 moves the 35 normal position and thus releases the automatic latter about its pivot l4. Change O the original. The rack then automati- .The control lever 5 is connected by a pin 23 cally returns to initial position, and the lever for with a slide 25. The slide 25 is'embedded in a releasing the change of the original is returned guide or carriage 24 connected with the side wall 40 to securing position. This is effected by a control I3 and carries a cam disc 28 which is lifted when 40 cam rotating with the drum and a slide roll which the lever 5 is swung out whereby at the rotation bring the lever controlling the change of the orig- .of the drum 2| a lever arm 21 is raised. The inal back to operating position, whereupon after lever arm 21 is positioned on a shaft 22 in the engagement of the locking mechanism the stop drum 2|, which carries the grippers 28 for holding lever controlled by the rider is secured by a theform. Owing to this operation, the grippers p in 28 extending through the circumference of the By way of example, the-invention is illustrated drum are opened, the form hitherto fixed on the in one embodiment inthe accompanying drawdrum 2| isthus released after the grippers 28 ings, in which Figure 1 is a side view of the device; have passed the lowermost point of the drum 2| Fig. 2, a section of Fig." 1 with the toothed disc and drops onto a delivery table 35 which is ar- 50 removed shortly before the pressing back of the ranged on the machine frame. hand lever; and Fig. 3,'a partial top view. The new form which .is to be clamped is laid Referring to the drawings, a. rack I is slidably, upon a feeding table 20 which is pivotally supmounted in its longitudinal direction in guides ported by a rod 32, which in its turn is pivotally I8 which are secured to the machine frame I3. mounted at 34 on the machine frame, and further Simultaneously with the motion of the lever 5 the pin it is lowered, whereby the front portion of the table 20 is moved by the springs it towards the drum 2 I. In the meantime, the drum 2| has continued to rotate, so that the grippers 28 ex tending over the circumference thereof in opening position have slipped under the front edge of the form to be fixed on the circumference of the drum 2i. The table 26, by means of the pins li arranged on the drum 2i and the noses l 6, is then drawn in the direction ofrotation of the drum 2i until the opened grippers 28, owing to the sliding ofi of the lever arm 21 from the cam disc 26, close again and thus fix or hold the form positioned within range of the grippers 23.

When the lever 5 is drawn by the spring i, the pawl t is lifted out of range of the teeth of the rack i by a rod 8 pivotally connected with the lever 5 and the pawl 6. The released rack l is then returned to initial position by the spring a. After the spring I has acted upon the lever 5 the eccentrically disposed disc it which in normal. position of the lever 5 freely rotates with the drum 29 passes over the slide roll H of the lever 5 and. brings the latter back to initial position. Then the spring l2 draws the stop lever 8 into normal position, so that the lever 5 is secured by the nose to of the lever ii and the pin 5a. The lever'ii remains in normal position until the process described is repeated. i

What I claim and desire to secure by Letters Patent of the United States is:

1. In a rotary duplicator for printing on sheets a device for controlling the change of the form after a predetermined number of copies, comprising a rotatable printing drum, means for automatically changing the form, a movable rack, a rider adjustable on said rack, a stop lever operatively connected with the means for changing the form, and a control projection connected with said drum and being capable to rotate with the same, the said control projection being arranged so as to displace said rack step by step at each rotation of said drum until the rider adjustable on the rack releases by means of said stop lever the means for automatically changing the form.

2. In a rotary duplicator for printing on sheets a device for controlling the change of the form after a predetermined number oi copies, comprising a rotatable printing drum, means for automatically changing the form, a movable rack, a rider adjustable on said rack, a lever controlling the means for changing the form, a stop lever engaging the said controlling lever, spring means secured to one'end of said rack, a pawl locking the rack, a rod pivotally connected with the said pawl and the said controlling lever, and a control tooth connected with the said drum and capable to rotate with the same, the said control tooth being arranged so as to displace said rack step by step at ,each rotation of said drum until the said rider releases by means of said stop lever the-lever controlling the means for changing the form, whereas the said pawl, rod and controlling lever being arranged and interconnected so that at the motion of the stop lever by the rider-releasing the controlling lever the said pawl is lifted out of the rack and the latter is returned to zero position by the said spring means.

3. In a rotary duplicating machine for printing on sheets a device for automatically controlling the change of the form after a predetermined number of copies, comprising a machine fram Y supported by a pin i5 arranged on the lever 5. a printing drum rotatably mounted in the ma-.

chine frame, means for automatically changing the form, a longitudinally slidable rack, a rider adjustable on said rack, a spring secured to one end of the rack, a pawl locking the rack, a lever controlling the means for changing the form, a two-armed stop lever disposed in the machine frame, one arm of the said stop lever being fitted with a nose whereas the other arm of the stop lever is positioned in the path of the rider, a pin on the said controlling lever adapted to engage the said nose of the stop lever, a rod pivotally connected with the said controlling lever and the said pawl, and a control tooth connected with the said drum and adapted to rotate with the same, the said control tooth being arranged so as to displace said rack step by step at each rotation of said drum until the said rider releases by means of said stop lever the lever controlling the means for changing the form, whereas the said pawl, rod and controlling lever being arranged and interconnected so that at the motion of the stop lever by the rider releasing the controlling lever the said pawl is lifted out of the rack and the latter is returned to zero position by the said spring.

i. In a rotary duplicating machine for printing on sheets a device for automatically controlling the change of the form after a predetermined number of copies, comprising a machine frame, a printing drum rotatably mounted in the machine frame, means for automatically changing the form, a longitudinally slidable rack, a rider adjustable on said rack, a spring secured to one end of the rack, a pawl locking the rack, a lever controlling the means for changing the form, a two-armed stop lever disposed in the machine frame, one arm of the said stop lever being fitted with a nose whereas the other arm of the stop lever is positioned in the path of the rider, a pin on the said controlling lever adapted to engage the said nose of the stop lever, a spring secured to the stop lever for holding the nose of the same in engagement with the said pin of the controlling lever, a rod pivotally connected with the said controlling lever and the said pawl, a control cam connected to the said drum and adapted to rotate with the same, a slide roll mounted on the said controlling lever and adapted to engage with the said control cam, and a control tooth rotatable with the said drum, the said control tooth being arranged so as to displace said rack step by step at each rotation of said drum until the said rider releases by meansof said stop lever the lever controlling the means for changing the form, whereas the said pawl, rod and controlling lever being arranged and interconnected so that at the motion of the stop lever by the rider releasing the controlling lever the said pawl is lifted out of the rack and the latter is returned to zero position by the said spring, while the controlling lever is brought again in its initial position by means of the said control cam and slide roll.

5. In a rotary duplicating machine for printing on sheets a device for automatically controlling the change of the form after a predetermined number of copies, comprising a machine frame, a rotatable printing drum mounted in the machine frame, a table for feeding the form pivotally mounted on the machine frame, a lever for controlling the change of the form being pivotally mounted on the said frame, a pin on the controlling lever for supporting the feeding table, spring means connected with the feeding table for pressing the same down on thesupporting pin of the controlling lever so that when the latter is lowered the feeding table approaches the said drum, 9. rotatable shaft on the drum, grippers for holding the form, the said grippers being arranged on the said shaft and extending through the circumference of the drum; a lever arm secured on the said shaft, a slide roll on the said lever arm, a carriage on the machine frame, a slide embedded in the said carriage and guided by the same, a cam disc disposed on the slide, a pin arranged on the slide, an opening in the said controlling lever for engaging with the said pin of the slide so that the slide and its disc cam may be lifted together with the controlling lever whereby the said cam disc is brought in the path of the lever arm and slide roll so as to lift the same and the grippers and release the clamped form, noses on the said feeding table, pins arranged on the drum adapted to engage with the said noses of the feeding table when the latter is lowered so as to withdraw the feeding table in the direction of rotation of the drum a longitudinally slidable rack, a rider adjustable on the rack, a spring secured to one end of the rack, a pawl locking the rack, a two-armed stop lever disposed on the machine frame, one arm of the said stop lever being fitted with a nose whereas I the other arm is positioned in the path of the rider, a pin on the said controlling lever adapted to engage the said nose of the stop lever, a. spring secured to the stop lever for holding the nose of the same in engagement with the said pin of the controlling lever, a rod pivotally connected with the said controlling lever and the said pawl, a control cam connected to the said drum and adaptedto rotate with the same, a slide roll mounted on the said controlling lever and adapted to engage with the said control cam, and a control tooth rotatable with the said drum, the said control tooth being arranged so as to displace said rack step by step at each rotation of said drum until the said rider releases by means of said step lever the lever controlling the means for changing the form, whereas the said pawl, rod and controlling lever being arranged and interconnected so that at the motion of thestop lever by the rider releasing the controlling lever the said pawl is lifted out of the rack-and the latter is returned to zero position by the said spring, while the controlling lever is brought again in its initial position by means of the said control cam and slide roll.

LEO KLUITMANN.

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