US2177787A - Sheet delivery mechanism - Google Patents

Description

Oct. 31, 1939. c 1- 2,177,787

SHEET DELIVERY MECHANISM Filed July 6, 1938 2 Sheets-Sheet l W e l8 4e 7 u N [75 f4 4 5) INVENTOR. C/mr/as .7. 72 00? BY z gmq Q? ATTORNEYS.

Oct. 31, 1939. c. F. Roo'r SHEET DELIVERY MECHANISM Filed July 6, 1938 2 Sheets-Sheet 2 INVENTOR. 6%0/449.) (if .2700 7 v ATTORNEY;-

Patented ocuzn, 1939 uuireo sraras PATENT OFFICE 2,177,787 SHEET DELIVERY MECHANISM Charles F. Root, Cleveland, Ohio, assignor to The Chandler & Price Company, Cleveland, Ohio, 1?

a corporation of Ohio Application July 6, 1938, Serial No. 217,702

Claims.

moving printed sheets from the platen of a printing press.

A primary object of the invention is to provide mechanism of the character described which shall be effective to move the sucker tips in a predetermined path to and from the platen of the press.

Another object of the invention is to secure a movement of the aforesaid character without elevation of the rods upon which the carriage mounting the delivery sucker tip assembly slides and without the use of a larger number of operating elements for this purpose than has hereto.- fore been provided in presses having sheet delivery mechanism,

. Tothe accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particu- Y larly pointed out in the claims; the annexed drawings and the following description setting forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of, various mechanical forms in which the principle of the invention may be used.

In said annexed drawings Fig. 1 is a fragmentary side elevation of a platen press having incorporated therewith the sheet delivery mechanism of the present invention; 1.

Fig. 2 is a fragmentary view, partly in elevation and partly in section, taken on the line 2-2 of Fig. .1; Fig. 3 is a fragmentary plan View of the sucker tube assembly;

Fig. {i is a side elevational view of a modified form of the invention;

Fig. 5 is a front elevation of the mechanism shown in Fig. 4; and

Fig. 6 is a verticalcross-sectional view of the suction post bearing shown in Figs, 4 and 5.

Referring more particularly to the drawings, there is shown the frame l of a platen press, provided with the usual oscillating platen 2. Secured to the feed table post 3 of the press is a bracket consisting of a relatively flat portion frame I of the press, as by a bolt The rod 1 is inclined downwardly towards the frame of the press and. forms a guide for the sheet delivery mechanism proper, to be now described.

Slidably mounted on the rod 1 is a carriage or sleeve it, which has formed integrally therewith adjacent its forward end a depending cylindrical bearing portion II, and adjacent its rear end an upstanding ear I2, providing a support for a roller l3. The sleeve in is further formed to provide a roller track I4, which is inclined to the axis of the sleeve.

Supported for oscillating movement within the bearing portion I l of the sleeve ill is a stub shaft I5, formed at one end with a cylindrical portion 56, the axis of which is at right angles to that of the shaft !5. The shaft I5 is secured against axial movement by means of a plate or disk I! bearing against one end of the bearing portion II and secured to the shaft It by means of a screw l8.

Slidably mounted within the cylindrical portion It of the shaft I5 is a tubular lever l3, having a portion 26, to the ends of which are pivotally secured a link 2| and a bell-crank lever 22. The link 2| has pivotally secured to its other end a bell-crank lever 23, pivoted as at 24 to the frame 5! of the press or to the housing (not shown), for earns 25 and 26. One arm of the lever 23 carries a cam roller 21, which bears against the periphcry of the cam 25. The bell-crank lever 22 is pivoted as at 28 to the frame I of the press or to the housing upon which the lever 23 is mounted and one arm of the lever 22 carries a cam roller 29, which bears against the periphery of the cam 26. The cams 25 and 26 are keyed to a shaft 3|], which is driven by the press operating mechanism in synchronism with the oscillation of the platen 2.

The lever I!) has rigidly secured to its upper end a hollow member 31 having a horizontally disposed portion 32, which forms a bearing for a tubular L-shaped post 33, the interior of which communicates with the interior of the lever IS. The post 33 is secured against axial movement relatively to the bearing 32 by means of a disk 3%, which bears against the outer end of the hearing 32 and is secured to the post 33, as by a screw 35. The bearing 32 has mounted thereon a freely revoluble roller 35, which is adapted to roll on the track I4. Rigidly secured to and extending rearwardly from the horizontal portion of the post 33, adjacent the roller 36 is a member 3! having an elongated slot 38 in the rear portion thereof, forming a trackway for the roller I3.

Secured to the upper end of the post 33, as by a clamp screw 39, is a socket to, to the horizontal portion 4% of which is secured a hollow delivery bar ll. Secured to the bar M, at spaced points therealong are clamp fittings 42, and secured to these fittings, as by screws 22 are fittings 22 having tubular portions 42. Mounted Within the portions i2 of the fittings 42 are tubular arms 63 having arms M telescopically mounted therein, and provided at their forward ends with the usual sucker tips 65. The arms M are clamped in adjusted position by means or clamp screws #36. The arms lli, being adjustable axially oi the arms 43, the position of the sucker tips with respect to the front and rear edges of the platen may be varied Moreover, since the fittings 32' may be adjusted angularly about axes normal to the axis of the bar ll, the sucker tips may be adjusted arcuately with respect to the side edges of the platen. These adjustments are indicated by the arrows in Fig. 3

The earns 25 and 26, as noted in Fig. l, rotate continuously in a counter-cl ckwise direction. As the cam 25 rotates, it imparts a counter-clockwise movement to the lever 2-3, and thus, through the link 22!, aoves the lever l9 rearwardly from the solid line position. This in turn causes the carriage or sleeve it to he slid rearwardly along the rod i from the soil" to the dotted ii -e position. In the course of this movement, the roller 3% rides up on the inclined track This serves two purposes. It causes sufficient axial movement of the lever IE? to move the cam roller 29 away from the periphery of the cam .26, so that this cam is ineffective during the rearward movement of the lever IQ. It also elevates the lever it sufiiciently so that the sucker tips move rearwardly in a straight line R, which, as shown in Fig. l, is included at a slight angle to the plane of the upper surface of the platen 2 in the upper or delivery position of the latter. This insures that the printed sheet to be delivered to the delivery table will be lifted from the platen at the initiation of the delivery stroke.

During the aforesaid rearward stroke, the roller 53 rides in the slot 38, so that the post 33 is maintained substantially at right angles to the rod 7 during the entire stroke.

The lever i9 is moved forwardly by means of springs (not shown) which act on the levers 2.2 and the cam is being relieved, as shown to permit the lever id to return to the solid line position of Fig. 1. The cam 26 is so that during the forward strolre oi the lever l9 the latter is at first moved axially upwardly, bringing the roller iiii away from the track M, and causing the post to tilt rearwardly, the roller l3 acting as a fulcrum during such tilting. This tilt is increased as the lever approaches a position intermediate the dotted and solid line portions of Fig. l, and thereafter the post is tilted forwardly, finally assuming the solid line position of Fig. 1. As a result of this aforesaid tilting movement, the sucker tips l5 move in the curved path F, the tips at first rising in a gently sloping upward curve to a point above the rear portion of the platen and then downwardly towards the platen in a somewhat more abrupt curve.

With the arms id in their fully retracted position of adjustments, the sucker tips 45, as shown in Fig. take a path indicated by the reference characters R. and F, the portion F of this path being somewhat flatter than the path F, but in other respects generally similar to the latter.

It is thus seen that a desired path of movement is imparted to the sucker tips without the necessity of lifting relatively heavy portions of the press, such as the rod 1, and. without a larger number of operating elements for this purpose than has heretofore been provided in presses having sheet delivery mechanism.

In that form of the invention shown in Figs. 4, 5 and 6, he carriage H) has formed thereon, in addition to the inclined track i l, a lug or car 5Q, to which is secured a short rod or bar 5!, which is disposed above and parallel with the rod l'. Slidably mounted on this rod. is a sleeve 52 having pins at its opposite sides. Pivotally secured to these pins are levers E-l, the forward end of which are rigidly clamped to a lug or ear 55 formed on the suction post 33 as by means of a bolt 56 and nut 5?. The lower horizontal portion of the post is journaled in the bushing which is rigidly secured within the bearing portion 32' of the member 3!, which corresponds with the member 3! in the previously described form of the invention. In this case, the roller 3? as shown in Fig. 6, is held in po- ...;tween the end flange of the bushing and the bearing portion 32 of the member 3! In this form of the invention, the action of the elements is substantially the same as in first form of the invention which has been described. The portion 01 the post from which lug 55 extends and the levers 56 form, in effeet, a bell-crank lever. On rearward movement of the lever 59, the sleeve 52 slides rearwardly on the rod 52. On the forward movement of the lever 59, the lever is lifted, resulting in tilting of the aforesaid hell-crank lever about the pins 53, simultaneously with the forward sliding movement of the sleeve 52.

Due to the manner in which the levers h l are clamp d to the lug an adjustment between the arms of the bell-crank lever is provided, which is of value in making adjustment of the sucker tips relatively to th platen or in modifying the of movement of the sucker tips within certain limits.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated any of the following claims or the equivalent of su h stated means be employed.

1. In a platen press, a track rigidly supported thereon, a carriage reciprocable on said track, and means for reciprocating said carriage, said means including a lever slidable relatively to the carriage as the latter is reoiprocated, and suction means supported by said lever.

2. In a platen press, a track rigidly supported thereon, a carriage reciprocable on said track, a stub shaft journalled in said carriage and provided with a cylindrical sleeve immovable with respect to said shaft, and means for reciprocating said carriage, said means comprising a tubular lever slidable in the cylindrical portion of said sleeve, and cams and levers for oscillating said tubular lever.

3. in a platen press, a track rigicLy supported thereon, a sleeve slidably mounted on said track, suction means, and means for imparting movement to said suction means, including a tubular lever oscillatable in a plane parallel with the. axis of said sleeve, and means for oscillating said lever, said lever supporting said suction means.

l. In a platen press, a track rigidly supported thereon, a sleeve slidably mounted on said track and having a trackway lying in a plane inclined to the axis of said sleeve, a lever for imparting reciprocal movement to said sleeve and roller 5. In a platen press, a track rigidly supported thereon, a carriage slidably mounted on said track, a stub shaft journalled in said carriage, means for reciprocating said carriage, said means comprising a tubular lever slidable relatively to said stub shaft, suction means, and means pivotally movable in relation to'said lever for supporting said suction means.

6. In a platen press, a track, a carriage slidably mounted on said track, a stub shaft journalled in said carriage, a tubular lever slidable relatively to said stub shaft, a suction post angularly movable relatively to said lever, and means for tilting said post rearwardly upon forward movement of said lever. I

7. In a platen press, an oscillatable platen, a track substantially parallel with said platen when the latter is in the sheet-de1ivery position, a carriage reciprocable on said track, and means for reciprocating said carriage, said means includ-' ing a lever slidable relative to the carriage as the latter is reciprocated, and suction means supported by said lever.

8. In a platen press, an oscillatable platen, a track substantially parallel with said platen when the latter is in the sheet-delivery position, a carriage reciprocable on said track, means for reciprocating said carriage, said means including a lever oscillatable in a plane spaced laterally of said carriage, a suction post carried by said lever, suction means carried by said post, and means constraining said post against appreciable tilting movement on rearward movement of said carriage.

9. In a platen press, an oscillatable platen, a lever, suction means supported by said lever, means for oscillating, said lever whereby to move said suction means to and from said platen, and means constraining said suction means to move away from the platen in a substantially straight line slightly inclined to the platen when the latter is in the sheet receiving position, and to move toward the platen in a continuously curving path.

10. In a platen press, a track, a carriage slidably mounted on said track, a stub shaft journalled in said carriage, a lever slidable transversely of said stub-shaft, a suction means carried by said lever, and means for tilting said suction means rearwardly as said lever moves forwardly toward the platen of said press.

CHARLES F. ROOT.

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