DE182824C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

- JKS 182824 -. CLASS i5d. GROUP

Addendum to patent 171149 of October 18, 1903.

Patented in the German Empire on December 16, 1903. Longest duration: October 17, 1918.

The main patent is a front lay and stripping device for stencil printing machines protected, in which these two devices are combined in such a way that in one position the front lay lies in the path of the inserted printing sheet, while the stripping device is out of the way, and that in the other position the front lay is out of the Ways has moved while the wiper is in the path of the paper sheet. In the main patent, both devices are rigidly connected to each other, so that the position one device completely determines the position of the other.

According to the present development of the device of the main patent, both devices are ■ structurally separated from one another, but in this way interrelated brought that the necessary dependency of the position of both parts is achieved. The structural separation from the stripping device enables a freer one Movement of the front lay so that it more effectively out of the path of the paper strip is moved out and an encounter with the sheet of paper when advancing is safer - is prevented as if both devices are rigidly connected to each other. in the In particular, the front lay device can have a larger number of stop fingers or in the form of a continuous rail.

Two embodiments of the subject matter of the invention are shown in the drawing.

Fig. Ι is a side view of the first embodiment.

Fig. 2 is a rear view of Fig. I.

3 and 4 are individual views showing the paper scraper and the paper stop represent removed.

Fig. 5 is a rear view similar to Fig. 2 but showing a modified embodiment of the paper stop and paper scraper.

Fig. 6 is a side view of Fig. 5, similar to Fig. 1, and illustrates the modified Embodiment of FIG. 5.

Fig. 7 shows the paper stop in the working position and the paper scraper in of inactivity.

The parts are mounted in a suitable frame A , which consists of two side walls a, a ^l (Fig. 2), which are connected by cross ^{bars α 2} , α ³ , and bearing pieces B protruding upwards. In the frame, the drum C is mounted, which carries the perforated sheet metal and the stencil sheet on its outer surface, which is common to all devices of this type. This drum is rotated by means of a crank and a gear train or by a motor.

According to the embodiment of the device according to FIGS. 1 to 4, D, D arms, which are rotatable on the crossbar a ^{2, are}

Claims (2)

are superimposed and downwards and backwards | Have curved ends on which eccentrics d (Fig. i) act, which are located on a shaft rotatable by means of a handle d ¹ (Fig. 2). A counter-pressure roller E is mounted in these arms D and can be brought into and out of the working position by virtue of the eccentric. The paper scraper shown in these figures consists of a rail F, which carries outstanding fingers f , the ends of which, equipped with star wheels f ^l , extend up to the vicinity of the line of contact between the template and the printing paper. This rail is, as in the main patent, rotatably mounted at the ends in the frame and is adjusted by means of a rocker lever G, which is mounted at g and grips with one end under the rail F , while the other end provided with a roller g ^{1 in the} Track of a thumb g ² , which is located on the adjacent head of the drum C is located. The action of this thumb rotates the paper scraper up and out of its operative position. On the rail F , arms H protruding downwards and forwards are attached, in the free ends of which an oscillating shaft h is mounted, which is provided with paper stop fingers h ^l . A stop thumb / z ^{2 is} fastened to the oscillating shaft h , the lower end of which is limited in the shape of a curve and interacts with a stop pin / i ³ which is carried by one of the arms D. A torsion spring 7? ⁴ (FIG. 2) strives to hold this thumb / z ² in the position shown in FIG. When the thumb is rotated in order to bring the stop fingers h ¹ into their rest position, the tension in the spring is therefore increased. A spring / is connected at one end to the cheek a ^{x of} the frame A and pulls at the other end on one of the arms H, in which the oscillating shaft h is mounted, to the thumb ft ² with the stop pin h ^s in a frictional connection obtain. Fig. Ι shows the machine ready to receive a sheet of printing paper. The latter is pushed forward over the table until its front edge hits the stop finger h ^τ. The drum is now rotated, the thumb g ² leaves the roller g ^l so that the latter can move upwards and the rear end of the lever G moves downwards, which in turn brings the scraper fingers f downwards into the position shown in FIG . Simultaneously with the downward movement of the scraper fingers, the stop arms move downward into the position of FIGS. 3 and 4. During this downward movement, the thumb h ² hits the pin h ³ on the arm D, so that the thumb, and consequently the oscillating shaft h, rotates and the stop fingers are brought from the working position to the rest position. Thus, the paper stop and the paper scraper are dependent on one another; when one is in the working position, the other must necessarily be in the rest position. A slightly different embodiment of the stop and stripping device is shown in FIGS. The parts act in essentially the same way and produce the same result. Here an eccentric K is attached to one of the head pieces of the drum C and interacts with a roller k ^l on a vertically displaceable rod k ² , whereby this rod is raised and lowered. The pressure roller E is mounted in the ends of arms D which correspond to arms D in FIGS. The spring / 'tends to keep the counter-pressure roller and thus at the same time the rod in its uppermost position. The paper stop / 2 ¹ is formed by an uninterrupted rail instead of individual fingers, which is attached to arms which are mounted on pegs in the frame. The arms have an angular extension / z ⁶ , at the free end of which a helical spring / ϊ ⁴ engages, which is attached to the crossbar a ^s . One arm is also provided with a projection h ^% , on which a pin h ³ at the lower end of the slide rod k ² acts. The spring / z ⁴ tends to bring the paper stop into the working position shown in FIG. Due to the interaction between the projection / ζ ² and the pin h ^s , this position is only possible when the vertically displaceable slide rod k ^{2 is} in its lowest position, into which it is moved by the eccentric K. Therefore, when the rod moves upwards, the pin h ³ moves the paper stop into the position shown in Fig. 6 against the action of the helical spring h *. . . As with the embodiment described above, the paper stop is only then in its working position when the template on the drum is outside the working position opposite the pressure roller. At this time, the sheet is advanced. The paper wiper consists of the same parts as in the second embodiment in the first form. Patent-A ν Proverbs: ■ i. Front lay and stripping device for stencil printing machines Patent 171149, characterized in that the front lay (h ^l ) and the paper stripping device (f), separated from one another, can each be rotated around special pins and connected to one another in this way by means of intermediate links (g ¹ , hr, h ^{a and} K, k ² ) Are brought together that when setting the front lay in the working position, the stripping device reaches the rest position and vice versa. 2. Front lay and stripping device according to claim 1, characterized in that a single drive device (g · ² , Fig. Ι to 4) is used to convert the front lay (h ^l ) and stripping device (f) . For this purpose 2 sheets of drawings.