US2161712A - Ejector for ejecting printed articles from a printing machine - Google Patents

Description

June 6, 1939. J KRELL 2,161,712

EJECTOR FOR EJECTING PRINTED ARTICLES FROM A PRINTING MACHINE Filed Feb. 7, 1938 4 Sheets-Sheet l Jnremar June 6, 1939. .1. KRELL 2,161,712

PRINTED ARTICLES FROM A PRINTING MACHINE EJECTOR FOR BJECTING Filed Feb. '7, 1938 4 Sheets-Sheet 2 J. KRELL 2,161,712

PRINTING MACHINE June 6, 1939.

EJECTOR FOR EJECTING PRINTED ARTICLES FROM A 4 Sheets-Sheet 3 Filed Feb. 7, 1938 Jm emar Cy. A r6// 4 Sheets-Sheet 4 Jrrrenfar': U. Z4e// June 6, 1939. 1 R L EJECTOR FOR EJECTING PRINTED ARTICLES FROM A PRINTING MACHINE Filed Feb. '7, 1938 Patented June 6, 1939 UNITED STATES EJECTOR FORYEJECTING PRINTED TI- CLES FROM A PRINTING MAC Joseph Krell, Berlin-Zehlendorf, Germany, as- I signor to Adrema Maschinenbauges m. b. 11.,

Berlin, Germany Application February 7, 1938, Serial No. 189,199

Germany February 27, 1937 7 Claims.

My invention relates to ejectors for ejecting printed articles of any kind, such as envelopes, sheets, forms, etc., from printing machines.

It has already been proposed in address-printing machines to arrange an ejector rod which is mounted to reciprocate in axial direction on the table of the machine and is operatively connected to the driving mechanism of the machine for moving it in forward, 1. e., ejecting direction,

and equipped with a spring for moving the rod in backward direction into its initial position.

My invention relates to improvements in machines of this type, it being understood, however, that I am not limited'to address-printing 5 machines.

One of the objects ofmy invention is to provide an ejector which is more simple and reliable than the ejectors as designed heretofore.

To this end, in combination with an ejector rod 20 arranged as described, I provide a striker lever which is fulcrumed on the frame of the machine, means which will be shown and described, by way of example, as a striker on the lever, and an adjustable clamp on the ejector rod, for

25 transforming the forward circular movement of the striker about the fulcrum of the striker lever into straight-line forward movement of the rod, and a striker spring arranged to move the striker lever in the direction of the forward movements.

30 A member is arranged on the printing arm for depressing the striker lever against the action of the striker spring. during the descent of the printing arm, thus putting the striker spring under tension. The striker lever is locked in its de- 35 pressed position by a pawl, and means which will be shown and described, by way of example, as the projecting end of a circular cam, is arranged on the pawl to be engaged by the member during the ascent of the printing arm, for

A 40 disengaging the pawl from the striker lever which now, under the reaction of the strong striker spring, throws the ejector rod into i ejecting position.

It is another object of my invention to provide 45 improved means for holding the ejector against operation during the skipping of printing plates.

To this end, in combination with the means aforesaid, I providemechanism which is operatively connected to the skipping means of the illustrated my ejector, by way of example, as adapted to an address-printing machine.

In the drawings Fig. 1 is a perspective illustration of the elector as arranged on the table of the machine.

Figs. 2, 3, and 4 are perspective detail illustrations of the ejector, drawn to a larger scale and showing, respectively, the initial or normal position of the ejector, an intermediate position, and the position after the ejector rod has com- 10 pleted its forward movement.

Referring now to the drawings, I is the table of the address-printing machine, 2 is its oscillating printing arm, 3 is the printing head at the free end of the arm, and 4 is the printing pad on the head .3. l'is a hopper for a supply of printing plates 5 which are intermittently moved to the printing station 5' along a track 6, so that a printing plate is presented to the head 3 at the printing station for every cycle of the machine. The mechanisms for oscillating the printing arm 2, for feeding the printing plates, and for skipping certain plates, are old and have not been illustrated.

A frame having a block l4 at its front, and a block l5 at its rear end, is secured on the table vl at the rear. An ejector rod I3 is mounted to slidein bores of the blocks with its rear end, and the vertical flange l2 of an angular ejector bar is secured to its front end. The ejector rod extends in parallel relation to the track 6 and the table I, and the ejector bar extends transversely to the track and is supported on the table by its horizontal flange II. The flange II is folded, as best seen in. Figs. 2, 3, and 4, to form a pocket :for the reception of a similar fold III at the rear end-of a horizontal tray 8. The fold III is inserted in the pocket II in the direction of the arrow H in Fig. 1, and, to facilitate the introduction, the upper flange of the pocket H is cut away at an angle of dgs. at 12. At its oppositeend, the pocket is flattened at 43 to limit the inward movement of the fold ID in the pocket II, or a check, not shown, is arranged at this end. The tray 8 is made of any suitable mate- 45 rial, for instance, press-spahn, and has a rectangular hole for the printing plate which is at .the printing station 5. The article to be angles to each other, and/or locating lugs 9 may be pasted to the tray.

as the tray a metal for instance, a mat advantage that it its other side overlapping the corresponding side of the tray.

It will appear from this that the tray, being connected to the bar ll, l2, partakes in the reciprocation of the bar, and that the bar extends transversely to the track 4 for the printing plates I, and is supported on the table I.

As described, the ejector bar ii, I! is secured to the ejector rod ll which is mounted to slide in its longitudinal direction and in parallel relation to the table in the two blocks i4, Ii of the frame on'the table. It, Figs.'2, 3, and 4,'is a clamp which is adjustabiy mounted on the rod it between the blocks l4 and i5, and equipped with a suitable screw for holding it on the rod. is is a pull-back spring placed about the rod II between the clamp l4 and the front block i4. The spring tends to hold the clamp it against the rear block II. In the normal or initial position of the ejector, Fig. 2, a buffer rod 33 at the rear of the clamp, best seen in Fig, 4, bears against a bufl'er of felt, leather, or other resilient material 24 in a bore of the rear block II. A similar rod 24, for cooperation with a buffer 39 in a bore" of the front block I4. is arranged at the front of the clamp.

Obviously, the movement of the ejector is a function of the size of the articles placed on the tray I. The larger the size, the shorter must be the distance between the front block and the bar ll, i2 in the initial position Fig. 2. To regulate the throw of the ejector, the screw of the clamp i4 is loosened and, while the clamp is held against the bufler 34 in the rear block it by. the pull-back spring I, the ejector rod II is pulled to the rearv through the clamp as far as required,

- and the clamp is then re-set by its screw. By

these means, the ejector bar Ii, i2 is held in the proper position with respectto the printing station I in conformity with the size of the articles to be printed, in the initial position'of the elector. I Y

44 is an angular dog which is pivoted on the clamp at 48. A spring, not shown, tends to urge the horizontal arm of the dog in upward direction, and this movement is limited by the vertical arm 4| of the dog bearing against the front face of the clamp ll.

22 is a sector-shaped striker lever which is ,fuicrumed on the frame of the blocks l4, It at 22. II is a strong striker spring which is secured to the lever 22 at II with one of its ends. The other end of the spring is anchored on the front block l4 at 22. The arrangement of the striker spring is such that in the initial position of the striker as shown in mg. 2 the axis of the spring extends through the axis of the fulcrum about which the striker lever 22 oscillates.

' 2| is a striker at the lower end of thestriker lever 22 which in the initial position bears against the back of the horizontal arm of the dog 44. 24 is a lug at the upper end of the striker lever 22, and 2| is a pawl which is fulcrumcd on the frame of the blocks and cooperates with the lug 24.

' 2! .is clear of the dog u, u.

' ejector bar ll. l ,2,andthe back spring I! is compressed by the At its upper end the pawl is made with a concave camming face I! curved to an arc of a circle about the axis of the fulcrum 22. 24 is a step at the lomr end of the camming face I, and 21 is a spring secured to the pawl and anchored in the frame at 20, for pulling the pawl toward the striker lever 22. e

In the normal position illustrated in Fig. 2, the ejector is at the rear end of its stroke and the camming face of the pawl 25 is held against,

the lug 24 by the spring 21. II is an operating member on the printing arm 2, of angular configuration and secured by a screw. when the printing arm 2 descends from its elevated position, Fig. 1, the member 3| whose elevated position is also shown in Fig. 2, descends with it, clearing the upper end of the pawl 25 but engaging, and depressing, the lug 24 and turning the striker lever 22 in downward direction against the action of the striker spring 30, as indicated by the arrow 22. Finally, as shown in Fig. 3, the lug 24 engages below the step 28 and the pawl 25 which heretofore'had not moved on account of the concentricity of its camming' face II with the are described by the end of the lug 24, is now turned against the arrow 35'. This movement of the striker lever occurs against the striker spring III which is now under strong tension, the striker lever 22 being locked by the step 26 of the pawl. The upper end of the pawl is now in the path of the re-ascending member fl, and the striker While the parts of the ejector are in the intermediate position Fig. 3, the envelope or the'like 1 on the tray 8 is printed. After this operation has been performed by the printing plate at the staascends to return into tion 5', the printing arm 2 The member Ii which,

its initial position, Fig. 1. during its descent, moved clear of the upper'end of the pawl 25, now engages this end, Fig. 4, and turns the pawl in the'direction of the arrow ll, Fig. 3, against its spring 21. The step 28 of the pawl new releases the mg 24 on the striker lever 22, and the strong spring 30 abruptly returns the lever 22 into its initial position, as shown in Fig. 4. When the member 3i has moved past the upper end of the pawl 25, Fig. 2, the spring 21 again holds the pawl against the lug 24 with its camming face fl, ready to lock the striker lever upon the 'next descent of member 8|.

When the striker lever 22 is thrown over abruptly, as described, by its striker spring, the striker 2| strikes the arm 44 of the dog on the clamp it a smart blow, throwing in the direction of arrow 31, Fig. 3, the ejector rod It, the

tray 8 while the pullclamp it moving toward the front block i4, Fig. 4. This jerks, in manner per se known, the printed enveiope 1 away from the machine in the same direction l1, and into a suitable container. Noise is suppressed'by the buffer rod 84 at the clamp ll striking the bufler II in the front block i4, and the movement of the ejector rod If in the direction of arrow 31 is arrested.

Immediately after the momentum of the ejector has become exhausted, and the bar i I, I2 and rod if have been arrested, the pullback-spring II which had been compressed, returns the parts into the position shown in Fig. 2. It will be understood that during the ejecting movement in the direction of arrow 21 the striker lever 22 is rocked only through an angle corresponding to the movement of the lever from the. position in Fig. 3 into the position in Fig. 4, or Fig. 2. The

lower end of the striker 2| has been elevated so far as to clear the arm 44 of thedog which now returns into its position below the striker so that the striker cannot strike the arm 44. In its rear final position the clamp I6 is arrested without noise by the buffer 34 in the rear block IS.

The ejector is now ready for another operation which occurs upon the subsequent descent of the, printing arm 2 for printing the printing plate which in the meantime has arrived at the printing station 5'.

If, however, this printing plate is one to be skipped, the striker lever 22 is locked against re-' turning into its initial position, Fig. 4, from the intermediate, position, Fig. 3, by the mechanism which will now be described.

The mechanism is equipped with a shaft ll arranged in-parallel relation to the ejector rod l3, and mounted to rotate in bearings forming part of the blocks I4 and IS. The clamp I6 is grooved to clear the shaft. 46 is a crank at that end of the shaft I l which projects from the front block ll in the direction toward the printing station, and 41 is a coiled spring placed on the crank pin and connected to a pin 48 on the arm 49 which forms part of the skipping mechanism. On the opposite end of the shaft I 8 is keyed a locking bolt 50 for cooperation with a stud 5| on the striker lever 22.

While the skipping mechanism is inactive, i. e., in such position that the plates are printed at the station 5', pressure is exerted on the arm 49 in the direction of the arrow 52 in Fig. 2, that the bolt 50 is clear of the stud 5|, and does not interfere with the oscillation of the striker lever from the position Fig. 3 into the position in Figs. 4 and 2.

If the plate at the printing station is one to be skipped, the control of the skipping mechanism moves the arm 49 against the arrow 52 during the descent of printing arm 2, the crank 46 turns the shaft It in the same direction, and the bolt 50 is moved toward the striker lever 22 when the parts are in the position Fig. 3, arresting the stud 5| and preventing upward movement 'of the striker lever 22 by its spring 30 notwithstanding its release by the pawl 25. The lever consequently cannot move from the intermediate position Fig. 3 into the position Fig. 4, the ejector is not operated by the striker 2|, and the non-printed envelope 1 remains at the printing stationuntil it has been printed, i. e., as soon as a plate to be printed has arrived at the station 5' and the bolt 50 has again been moved clear of the stud 5| on the striker lever 22.

The locking mechanism just described is dispensed with in machines of the type in which the printing arm remains in its elevated position when a printing plate is skipped, provided that each printing plate is to be printed a single time only, as the ejector in this machine is not operated when a plate to be skipped is at the printing station.

If it is desired to render the ejector inactive, the member 3| at the printing arm 2 is removed or so adjusted that upon its descent it will miss the lug 24 of the striker lever 22. The adjustment is effected by turning the member 3| through degs. about its screw on the printing arm 2, as shown in dotted lines in Fig. 1.

I claim:

1. In an ejector for ejecting printed articles from a printing machine, an oscillating printing arm, a frame, an ejector rod mounted to slide in the frame, a striker lever fulcrumed on the frame,

means for abruptly transforming the forward circular movement of the striker lever into forward straight-line movement of the ejector rod, 9. spring for returning the ejector rod into its initial position, a striker spring arranged to move the ,striker lever forward against the action of the return spring, a member on the printing arm for depressing the striker lever against the action of the striker spring during the descent of the printing arm, a pawl for locking the striker lever in its depressed position, means on the pawl adapted to be engaged by the member during the ascent of the printing arm, for disengaging the pawl from the striker lever, and mechanism operatively connected to the skipping means of the printing machine for holding the striker lever in its depressed position notwithstanding its release by the pawl.

2. In an ejector for ejecting printed articles from a printing machine, an oscillating printing arm, a frame, an ejector ro'd mounted to slide in the frame, a striker lever fulcrumed on the frame,

means for abruptly transforming the forward circular movement of the striker lever into forward straight-line movement of the ejector rod, 8. spring for returning the ejector rod into its initial position, a striker spring arranged to move the striker lever forward against the action of the return spring, a lug on the striker lever, a

member on the printing arm for engaging the lug and depressing the striker lever against the action of the striker spring during the descent of the printing arm, a pawl, a step on the pawl for engaging the lug and locking the striker lever in its depressed position, and means on the pawl adapted to be engaged by the member during the ascent of the printing arm, for disengaging the step from the lug.

3. In an ejector for ejecting printed articles from a printing machine, an oscillating printing arm, a frame, an ejector rod mounted to slide in the frame, a striker lever fulcrumed on the frame. an adjustable clamp mounted on the ejector rod, a dog fulcrumed on the clamp, a striker on the striker lever for engaging the dog, and abruptly throwing forward the ejector rod, a spring for returning the ejector rod into its initial position, inserted between the clamp and the frame, a striker spring connected to the striker lever for turning the lever so as to throw the striker of the lever against the dog, a member on the printing arm for depressing the striker lever against the action of the striker spring during the descent of the printing arm, a pawl .for locking the striker lever in its depressed position, and means on the pawl adapted to be engaged by the member dur-' ing the ascent of the printing arm, for disengaging the pawl from the striker lever.

4.'In an ejector for ejecting printed articles from a printing machine, an oscillating printing arm, a frame, a pair of spaced-apart blocks on the frame, an ejector rod mounted to slide in the blocks, an adjustable clamp mounted on the ejector rod between the blocks, buffers on the blocks, buffer rods at opposite ends of the clamp for engaging the buffers, a striker lever fulcrumed on the frame, a dog fulcrumed on the clamp, a striker on the striker lever for engag g the dog, and abruptly throwing forward the ejector rod, a spring for returning the ejector rod into its initial position, inserted between the clamp and one of the blocks, a striker spring connected to the striker lever for turning the lever so as to throw the striker of the lever against the dog, a member on the printing arm for depressing the striker 'leve'r against the action of the striker spring during the descent of the printing arm,

a pawl for locking the striker lever in its depressed position, and means on the pawl adapted to be I engaged by the member during the ascent of the printing arm, for disengaging the pawl from the striker lever.

5. In an ejector for ejecting printed articles from a printing machine, an oscillating printing arm, a frame, an ejector rod mounted to slide in the frame, a tray including a metal foil and secured to the rod for the reception of the articles, a striker lever fulcrumed on the frame, means for abruptly transforming the forward circular movement I of the striker lever into forward straight-line movement of the ejector rod, a spring for returning the ejector rod into its initial position, a striker spring arranged to move the striker lever forward against the action of .0 the return spring, a member on the printing arm for depressing the striker lever against the action of the striker spring during the descent of the printing arm, a pawl for locking the strikerlever in its depressed position, and means on the pawl adapted to be engaged by the member during the ascent of the printing arm, for dlsengagingthe pawl from the striker lever.

6. In an ejector for ejecting printed articles from a printing machine, an oscillating printing arm, a frame, an ejector rod mounted to slide in the frame, an angular ejector bar secured to the' .rod, a fold formed by the horizontal flange of the bar, a tray for the reception of the articles,

a fold on the tray adapted tobe inserted in the as fold of the horizontal flange, a striker lever fulcrumed on the frame, means for abruptly transforming the forward circular movement of the striker lever into forward straight-line movement of the ejector rod, a spring for returning the ejector rod into its initial position, a striker spring arranged to move the striker lever forward against the action of the return spring, a membet on the printing arm for depressingthe striker lever against the action of the striker springduring the descent of the printing arm, a pawl for locking the striker lever in the depressed position, and means on the pawl adapted to be engaged by the member during the ascent of the printing arm, for disengaging the pawl from the striker lever.

'7. In an ejector for ejecting printed articles from a printing machine, a table, an oscillating printing arm above the table, a frame on the table, an ejector rod mounted to slide in the frame in parallel relation to the table, a straight-edge secured to the table and overlapping that side of the tray toward which the articles are introduced, a striker lever fulcrumed on the frame, means for abruptly transforming the forward circular movement of the striker lever into forward straight-line movement of the ejector rod, 9. spring for returning the ejector rod into its initial position, a striker spring arranged to move the striker lever forward against the action of the return spring, a member on the printing arm for depressing the striker lever against the action of the striker springduring the descent of the printing arm, a pawl for locking the striker lever in its depressed position, and means on the pawl adapted to be engaged by the member during the ascent of the printing arm, for disengaging the pawl from the striker lever.

JOSEPH KRELL.

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