US2318165A

US2318165A - Sheet delivery mechanism

Info

Publication number: US2318165A
Application number: US414628A
Authority: US
Inventors: Kluge Eneval
Original assignee: BRANDTJEN AND KLUGE Inc
Current assignee: BRANDTJEN AND KLUGE Inc
Priority date: 1941-10-11
Filing date: 1941-10-11
Publication date: 1943-05-04
Anticipated expiration: 1960-05-04

Description

y 4, 1943- E. KLUGE 2,318,165

SHEET DELIVERY MECHANISM Filed Oct. 11, 1941 5 Sheets-Sheet 1 EneVal Kluge May 4, 1943. E, LU E SHEET DELIVERY MECHANISM Filed Oct. 11, 1941 5 Sheets-Shet 2 May 4, 1943. E. KLUGE SHEET DELIVERY MECHANISM Filed 05b. 11, 1941 v5 Sheets-Sheet s gwuc/rvfo't Enevgl Kluge M y 9 E. KLUGE 2,318,165

SHEET DELIVERY MECHANISM Filed Oct. ,11, 1941 "Emeval Kluge 5 Sheets-Sheet 5 Patented May 4, 1943 SHEET DELIVERY MECHANISM Eneval Kluge,

St. Paul, Minn.,

assignor to Brandtjen & Kluge, Inc., St. Paul, Minn., a. corporation of Minnesota Application October 11,1941, Serial No. 414,628 11 Claims. (01. ion-287) My invention relates to improvements in sheet delivery mechanisms and pertains especially to pneumatic delivery devices for printing presses of the Gordon type and of the nature disclosed in Patents No. 1,472,656 of October 30, 1923, No. 1,621,547 of March 22, 1927, and No. 2,088,377 of July 27, 1937, all granted to Abel Kluge and myself.

Said prior delivery mechanisms have functioned efficiently in extensive practice and particularly those disclosed in the second and third patents above noted. These mechanisms, as may be observed upon reference to said patents, have been incorporated in printing presses of the Gordon type equipped with pnuematic feeding means, such means including an oscillating feeding arm hung over a press and equipped at its free end with suction grips movable upon each cycle of the arm from a fixed sheet receiving position to the press platen and back again. The means employed for supplying a press with sheets to be printed has consisted of an elevated sheet magazine consisting of an inclined table for the reception of a pack of sheets on edge and consisting further of an advancing back rest for supporting the leaning pack and maintaining the leading sheet thereof at said fixed sheet receiving position as the feeding mechanism diminishes the pack, sheet by sheet. The sheet delivery mechanism of each of said patented structures has been located beneath the stock magazine of the press and has included a member movable back and forth to take the printed sheets from the open platen and deposit them on a delivery table. In the use of presses of the instant nature equipped with pneumatic sheet feeding and delivering mechanisms, it has become desirable to increase the capacity of the sheet magazines. sideratum may be accomplished and without radical reconstruction of press and feeder parts simply by extending the lower end of a magazine to make it longer. But, such acceptable lengthening of a magazine so narrowly reduces the spacebeneath it that a delivery mechanism constructed and arranged as heretofore cannot be accommodated therein.

It is an object of my present invention to provide a pneumatic sheet delivery mechanism for a self-fed printing press of the nature hereinabove indicated which is improved from the standpoints of simplicity, durability, cost of production, cost of maintenance, and efiiciency and convenience in use, it being also a purpose of my invention to furnish such a delivery mechanism in'which the .parts are so constructed and ar- This deranged that the sheet taking members are amply accommodated in overhead space limited in extent by a sheet magazine located thereabove.

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described.

In the drawings, Fig. 1 is a side elevational view of a pneumatically fed printing press of the Gordon type, the same being shown as equipped with pneumatic sheet delivery mechanismin embodiment of my present invention; Fig. 2 is a fragmentary elevational sectional view taken through the structure shown in Fig. 1, said view illustrating the inside of the cam-assembly seen from the outside in said Fig. 1; Fig. 3 is a fragmentary perspective view illustrating a portion of the press and'a portion of the delivery mechanism shown in Fig. 1; Fig. 4 is an elevational sectional view in detail taken as on the line 4-4 of Fig. 3, said view showing especially the carrier structure for the suction grips of the delivery mechanism; Fig. 5 is a plan view in detail of the structure shown in Fig. 4; Fig. 6 is a detail sectional view taken as on the line 66 of Fig. 4; Figs. 7 to 10 inclusive are diagrammatic views illustrating a typical path followed by the suction grips of the delivery mechanism and further il-' lustrating the carrier structure for said grips in difierent positions thereof in respect to the platen of the press and the sheet magazine of the feeding mechanism.

Reference being had to the accompanying drawings, it will be observed that the platen press illustrated therein conventionally includes a frame In, a cam-gear wheel ll, an oscillatory bed l2 rocked by said cam-gear wheel 'I I through sidearms l3, and an oscillatory'platen l4 also rocked by said cam-gear wheel II through a cam l5 (Fig. 2) V thereon and a cam-arm I6 cooperating with said cam. As is customary, during each cycle o f'the press, the bed II and platen l4 rock to close upon each other for the impression and then rock away from each otherto open and give access to the platen 14 for the removal of the printed sheet therefrom and for the application of a fresh sheet thereto.

The feeding mechanism, shown more or less diagrammatically in connection" with the illustrated press structure, is of the nature disclosed in said Patents Nos. 1,472,656 and 2,088,377 and more nearly resembles the disclosure of the latter patent. This feeding mechanism has a stock magazine for sheets to be printed, said magazine including an inclined table I! upon'which a leaning pack of sheets l8 stand on edge, the same being supported against toppling by a rest, I!) which is intermittently advanced always to present the foremost sheet of the ack at a predetermined or fixed sheet receiving position. Also included in said sheet feeding mechanism is a standard 26 anchored to the press frame I6 and carrying a feeder head 2| in which a feeder arm 22 hearing suction feed grips (not shown) is mounted to oscillate and in its oscillatory cycle of movement to carry the feed grips from a 10 cality enabling them to grasp a sheet at said sheet receiving position and thence down and over the platen l4 and back again for a new sheet. The mounting for the feeder arm 22 includes an eccentric member (not shown) which is rocked, as said feeder arm oscillates to project and to retract said arm. n

A cam assembly mounted at the side of the press frame l| includes a cam shaft 23 (Fig. 2') upon which

cams

24, 25, 26 and 21 are mounted, said cam shaft 23 being driven through

gears

28, 29 and 30 by the cam-gear II, which, in turn, is driven by a. gear 3| on the drive shaft 32 of the press. The cam 24 is engaged by a cam follower 33 on a lever 34 connected through a link 35 with a rocker-arm 36 which rocks the feeder arm 22 of the feeding mechanism, said eccentric mounting for said feeder arm 22 being rocked through a rocker-disk 31, a link 38, and a lever 39 having a cam-follower 4|] thereon engaging the cam 25 of said cam assembly.

The delivery mechanism to which my present invention especially pertains; includes a long oscillatory delivery arm 4| pivoted at its lower end, through a pivot 4 I, to the base of the press frame In at one side thereof, said arm extending upwardly in front of the platen I4. This arm 4| swings back and forth between a substantially upright rearmost position (dotted lines, 1) for the taking of a printed sheet from the platen l4 and in inclined foremost position (solid lines, Fig. 1) for depositing such printed sheet upon the delivery table 42 of the press. Threaded intothe upper end of the delivery arm 4| and extending inwardly therefrom is a headedstud 43 (Fig.6) upon which is swiveled a sleeve-like carrier member 44. A mounting 45 pivotedto said carrier member 44 has a hollow support 46 issuing therefrom and upon which suction grips 41, borne by tubular suction stems 48, are secured by means of

adjustable clamps

49, 49 embracing said support and stems. Said mounting 45 has a hollow shank 56 into which said support 45 is threaded, said shank being formed with a nipple 5| communicating with the interior of the support 46 through the interior of said shank 56, said nipple 5| having a suction hose 52 attached thereto. Carried by the hollow support 46 is a hollow Y fitting 53, the leg of which is clamped to said support 46 in a manner bringing the interior thereof into communication with the interior of said support, each of the branches of said fitting being connected by a length of suction hose 54 with one of the suction stems 48. The shank 56 of the mounting 45 has a head thereon formed with a planiform face 55 which faces a similar face 51 on the head 51 of a boss 58 formed integrally with the upper portion of the carrier member 44. This boss 58 and the head 51 thereof have a smooth axial bore extending therethrough which snugly but revolubly receives the body of a headed pivot screw 59, the tip of said -screw having right hand threads screwed into a threaded bore formed axially of the head 55 of said mounting 45. The carrier member 44 has a lug 60 (Fig. 4) at its rear side through which an upwardly extending abutment screw 6| is fitted, said screw being supplied with a lock-nut 62 adapted to be turned up against the bottom of said lug 66. Issuing forwardly from the shank 59 of the mounting 45 is a stop-lug 63 which engages the upper end of said set abutment screw 6| when the mounting 45 is swung down to locate the tubular support 46' roughly in substantially horizontal operative position, the more accurate positioning of said support 46, for any particular job, being accomplished by turning the screw 6| up or down as the occasion may require. In the operative and substantially horizontal position of the support 46, the pivot screw 59 is so turned in the head 55 of the mounting 45 that the face 55 of said head 55 is brought closely against the face 51 of the head 51 on the carrier member 44, thus depriving the mounting 45 of any lost motion relative to said carrier member 44 during the operation ofthe delivery mechanism. To shift the support 46 from its said operative position into an inoperative position for giving access to the press platen I4, without interference from said sup-' port and the parts carried thereby, said support 46 is readily swung upwardly, the head 55 of the mounting 45 unscrewing on the threads of the pivot screw 59 and causing its face 55 to be freed from contact with the face 51 of the head 51 on the carrier member 44. To limit the swinging of the support 46 away from its operative position and slightly beyond the vertical, or over center, where it will stand alone, I supply the head 51 on the carrier member 44 with an abutment 64, the same being engaged by the stop-lug 63 on the mounting 45 and keeping said mounting from swinging beyond its over-center position. Whenever it is deemed advisable to secure the support 46 against being swung back inadvertently from its upright inoperative position toward its operative position, the pivot screw 59 will be turned to clamp the face 55* of the head 55 on the mounting 45 against the face 51 of the head 51 on said carrier member 44. This having been done, the screw 59 will be loosened to unclamp the mounting 45 from the carrier member 44 when it is desired to return the support 46 to its operative position and, if necessary, said screw 59 will be retightened in such operative position of said support to preclude any lost motion between the mounting 45 and said carrier member 44. e

To swing the delivery arm 4| back and forth, I employ the cam 26 of the cam assembly in com junction with a bell-crank 65, one branch of which carries a follower 66 engaging said cam 26, the other branch of said bell-crank being connected through a link 61 with said delivery arm 4|. This swinging of the delivery arm 4| is attended with the swiveling of the carrier member 44 on the stud 53 issuing from said arm; such swiveling of said member 44 being effected by means now to be described. Secured to the press frame In and extending forwardly there: from along the path of the upper end of the delivery arm 4| is a bracket 68 (Fig. 3) having rel atively spaced guide-rails 69 between which the upper end of said arm 4| is slidably received. Pivotally mounted at its forward end to an upstanding lug 16 at the forward end of the bracket 68 is a vertically swingable cam-rail 1|, the free rear end of said cam-rail being received between relatively spaced upstanding guide-lugs 12 at the rear endof said bracket 68; To swing the camrail 1| up and down, a link 13 connects the free end of said cam-rail with a lever 14 equipped with a follower 15 engaging the cam 21 of the cam assembly. The upper edge of the cam-rail 1| provides its cam surface it and riding said cam surface is a follower roll 71 mounted on the end of cam-arm 18 issuing rearwardly from the carrier member 44. Yieldingly operating to keep said follower roll 11 in engagement with the cam surface 16 of the cam-rail 1| is a thrust-rod 19 socketed at its upper extremity in the end of an arm 80 issuing forwardly from the swiveled carrier member 44. The thrust-rod 19 is slidably mounted in a guide-clip 8| secured to the delivery arm 4|. Encircling the thrust-rod 19 to urge the same upwardly is a helical spring 82 which is compressed between said guide-clip 8| and a washer 83 keyed to said thrust rod 19.

Extending along the forward edge of the-delivery arm 4| is a metallic suction tube 84 which is secured at its upper end to the upper end of said arm 4| by said guide-clip 8|, the lower end of said tube 84 being secured to the lower end of said arm 4| by a fastening clip 85. The suction hose 52, attached at the one end thereof to the nipple of the mounting 45, is flexible and attached at its other end to the upper end of said suction tube 84, said hose- 52 being looped under the bracket 88 and flexing to accommodate the movements of the mounting 45 relative to the delivery arm 4|. The lower end of the suction tube 84, located near the pivot M of the delivery arm 4|, has a hose 85 connected therewith which leads to a suction pump (not shown) driven by the press mechanism. Suction in this hose 86 is alternately established and relieved by valve means, not shown herein, to cause the suction grips 41 to grasp a sheet at the sheet taking position of said grips and to release the sheet at their sheet depositing position.

The swinging cycles of the delivery arm 4|, cam-rail 1| and press platen M are concurrently effected and coordinated so that the suction grips 41, properly adjusted to the particular job in hand, will take a printed sheet from the open platen, carry it forward therefrom and drop thesame upon the sheet delivery table 42.

lhe cam surface of the cam-rail1| throughout the greater portion of its extent, from the front portion thereof toward the rear, substantially conforms with an arc struck from the pivotal axis of the delivery arm 4|, the rear portion of said cam surface dipping downwardly within such arc. With the roll 11 of the carrier member 44 following said cam surface 16 on the swinging cam-rail 1|, each suction grip 41 is directed as through typical paths indicated in each of the Figs. 7 to 10 inclusive. In Fig. 7, the delivery arm 4| is shown in its extreme forward position at a time when the cam-rail 1| is depressed. correspondingly, the suction grip 41 is at its lowermost and extreme forward position, having been carried into such position from the open platen M with a printed sheet preparatory todepositing such sheet on the feed table of the press. During the closing of the platen M, the cam-rail 1| is swung upward causing the suction grip 41, now relieved of the printed sheet previously grasped thereby, to be carried in an ascending path 81' to its uppermost and extreme forward position (Fig. 8). Following this positioning of the suction grip 81, the delivery arm 4| moves rearwardly carrying said grip toward the then closed platen H- in a generally elevated path 88.

When the follower 11 of the carrier member 44 reaches the said dipped portion'89 of the'camrail 1|, the elevated path 88 of the suction grip 41 dips correspondingly and brings said grip to the end of its said generally elevated'travel, as shown in Fig. 9. In the final stage of the opening movement of the platen l4, the delivery arm 4| progresses in the final stage its rearward swing and, concurrently therewith, the cam-rail 1| is swung downward, the result being that the suction grip 41 pitches downward, as in the path 90, arriving at the face of the platen 54 as said platen reaches its fully open position (Fig. 10). Here, the suction grip 41 grasps the printed sheet on the platen l4 and this having been accomplished, the delivery arm 4| swings away from the platen l4 to remove the grasped sheet therefrom. Upon this swing-away movement of the delivery arm 4|, the suction grip 41 follows a depressed path 9|, the cooperation of the clipped portion 89 of the cam-rail 1| with the follower, .11 causing the grip 41 to rise from the platen M as it begins its departure therefrom, whereby the sheet is freed from any danger of being dislodged from the grasp of the suction grip 41 by the scuffing thereof along the platen.

Among the numerous advantages residingin my present construction is the advantage gained by the employment of the delivery arm 4| to carry the suction grips 41 and their supporting means and by the further employment of the swinging cam-rail to effect the dipping of the suction grips 41. This provision makes for simplicity in construction and for quiet, long-wearing, smooth and efficient operation. Furthermore, in this construction, the required. overhead space progressively decreases forwardly from the platen and accords with the corresponding progressively increasing requirement for space occasioned by the lengthening of the stock magazine in enlargement of its capacity. In respect to the suction line leading to the suction grips 41, my improved arrangement of parts compactly supports the non-flexible and flexible conduit sections, the latter readily accommodating the limited flexing movements imposed upon them. The grip support 46 is readily adjusted to the precise operating position desired and, so adjusted, is firmly held relative to the carrier member 44. Yet, without binding, said support 46 is readily swung upwardly into an over-center inoperative position, where it is self-retained and, if desired, additionally clamped by the pivot screw 59 upon which it swings.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. Delivery mechanism for a self-fed platen printing press having a delivery .table in front of the platen and an overhead magazine for sheet stock, said mechanism comprising an oscillatory delivery arm pivoted at its lower end to the base of the press at one side thereof and swingable from a substantially upright rearward position to an inclined forward position, a carrier member swiveled to the upper end of said arm, a support extending inwardly of the press structure and mounted on said carrier member, said support having a suction grip thereon, a bracket extending forwardly from the press frame and including spaced rails at opposite sides of said delivery arm for guiding the same in its swinging movements, a swingable cam-rail pivoted at its forward end to the forward end of said bracket, the rearward end of said bracket having guides for the rearward end of said cam-rail to guide the same vertically, said cam-rail having a cam surface extending therealong said cam surface in greater part substantially coinciding with an arc struck from the pivotal axis of the delivery arm and clipping at its rearward portion beneath such are, said swiveled carrier member having a cam-arm thereon coacting with the cam surface of said cam-rail, means for swinging the delivery arm back and forth to carry the suction grip rearwardly over the platen for the taking of a sheet therefrom and forwardly over the delivery table for the depositing of the sheet thereon, said delivery arm substantially throughout its entire forward movement directing said carrier member in a descending arc to clear the overhead stock magazine of the press, means for swinging the cam-rail up and down to cause the grip to follow an elevated path upon its approach I to the platen and to depart from the platen along a lower path, the cam surface of said cam-rail and the downward swinging thereof combining in cooperation with said cam-arm to turn the swiveled carrier member and cause the suction grip to dip sharply to a position for grasping a sheet on the platen and, upon .thus dipping, to

clear the opening platen, arriving at such position substantially concurrently with the completiqn of the opening of said platen, said cam surface further cooperating with said cam-arm reversely to turn said swiveled carrier member and cause the grip to rise from its said sheet grasping position as it moves forwardly to sheet depositing position,

2. Delivery mechanism for a self-fed platen printing press havin a delivery table in front of the platen and an overhead magazine for sheet stock, said mechanism comprising an oscillatory delivery arm pivoted at its lower end to the base of the press at one side thereof and swingable from a substantially upright rearward position to an inclined forward position, a carrier member swiveled to the upper end of said arm, a support extending inwardly of the press structure and mounted on said carrier member, said support having a suction grip thereon, a bracket extending forwardly from the press frame, a swingable cam-rail pivoted at its forward end to the forward end of said bracket and having a cam surface extending therealong, said cam surface in greater part substantiaily coinciding with an arc struck from the pivotal axis of the delivery arm, said swiveled carrier member having a camarin thereon coacting with the cam surface of said cam-rail, means for swinging the delivery arm back and forth to carry the suction grip rearwardly over the platen for the taking of a sheet therefrom and forwardly over the delivery table for the depositing of the sheet thereon, said delivery arm substantially throughout its entire forward movement directing said carrier memher in a descending arc to clear the overhead stock magazine of the press, means for swinging the cam-rail up and down to cause the grip to follow an elevated path upon its approach to the platen and to depart from the platen along a lower path, the cam surface of said cam-rail and the downward swinging thereof combining in cooperation with said cam-arm to turn the swiveled carrier member and cause the suction grip to dip sharply to a position for grasping a sheet on the platen and, upon thus dipping, to clear the opening platen, arriving at such position substantially concurrently with the completion of the opening of said platen.

3. Delivery mechanism for a platen printing press having a delivery table in front of the platen, said mechanism comprising an oscillatory delivery arm pivoted at its lower end to the base of the press at one side thereof and swingable from a substantially upright rearward position to an inciined forward position, a carrier member swiveled to the upper end of said arm, a support extending inwardly of the press structure and mounted on said carrier member, said support having a suction grip thereon, a bracket extending forwardly from the press frame, a swingable cam-rail pivoted at its forward end to the forward end of said bracket and having a cam surface extending therealong, said cam surface in greater part substantially coinciding with an arc struck from the pivotal axis of the delivery arm and dipping at its rearward portion beneath such arc, said swiveled carrier member having a cam-arm thereon coacting with the cam surface of said cam-rail, means for swinging the delivery arm back and forth to carry the suc tion grip rearwardly over the platen for the tak-.- ing of a sheet therefrom and forwardly over the delivery table for the depositing of the sheet thereon, said delivery arm substantially throughout its entire forward movement directing said car ier member in a descending are to provide overhead clearance, means for swinging the camrail up and down to cause the grip to follow an elevated path upon its approach to the platen and to depart from the platen along a lower path, the cam surface of said cam-rail and the downward swinging thereof combining in cooperation with said cam-arm to turn the swiveled carrier member and cause the suction grip to dip sharply to a position for grasping a sheet on the platen and, upon thus dipping, to clear the opening platen, arriving at such position substantially concurrently with the completion of the opening of said platen, said cam surface further cooperating with said cam-arm reversely to turn said swiveled carrier member and cause the grip to rise from its said sheet grasping position as it moves forwardly to sheet depositing position.

4. Delivery mechanism for a platen printing press having a delivery table in front of the platen, said mechanism comprising a movable delivery element, a carrier member swiveled to said element, a support mounted on said carrier member, said support having a suction grip thereon, a vertically movable cam-rail having a cam surface extending therealong, said swiveled carrier member having a cam-arm thereon coacting with the cam surface of said cam-rail, means for moving the delivery element back and forth to carry the suction grip rearwardly over the platen for the taking of a sheet therefrom and forwardly over the delivery table for the depositing of the sheet thereon, said delivery element substantially throughout its entire forward movement directing said carrier member in a descending path to provide overhead clearance, means for moving the camrail to cause the grip to follow an elevated path upon its approach to the platen and to depart from the platen along a lower path, the cam surface of said cam-rail and the movement thereof combining in cooperation with said cam-arm to turn the swiveled carrier member and cause the suction grip todip sharply to a position for grasping a sheet on the platen and, upon thus dipping, to clear the opening platen, arriving at such popletion of the opening of said platen, said cam surface further cooperatin with said cam-arm reversely to turn said swiveled carrier member and cause the grip to rise from its said sheet grasping position as it moves forwardly to sheet depositing position.

5. Delivery mechanism for a platen printing "press having a delivery table in frontv of the platen, said mechanism comprising a movabl delivery element, a carrier member swiveled to said element, a support mounted on said carrier member, said support having a suction grip thereon, a

vertically movable cam-rail having a cam surface extending therealong, said swiveled carrier member havinga cam-arm thereon coasting with the cam surface of said cam-rail, means for moving the delivery element back and forth to carry the suction grip rearwardly over the platen for the taking of a sheet therefrom and forwardly over the delivery table for the depositing of the sheet thereon, said delivery element substantially throughout its entire forward movement directing said carrier member in a descending path to provide overhead clearance, means for movingthe cam-rail to cause the grip to follow an elevated path upon its approach to the platen and to depart from the platen along a lower path, the cam surface of said cam-rail and the downward move ment thereof combining in cooperation with said cam-arm to turn the swiveled carrier member in one direction and cause the suction grip to dip to a position for grasping a sheet on the platen, said cam surface further cooperating with said camarm in the depressed position of said cam-rail reversely to turn said swiveled carrier member and cause the grip to rise from its said sheet grasping position as it moves forwardly to sheet depositing position.

6. Delivery mechanism for a self-fed platen printing press having a delivery table in front of the platen and an overhead magazine for sheet stock, said mechanism comprising an oscillatory delivery arm pivoted at its lower end to the press frame and swingable from a substantially upright rearward position to an inclined forward position, a grip carried by said arm at the upper end thereof, means for swinging said delivery arm back and forth to direct said grip rearwardly over the platen to reach a sheet thereon and forwardly over said table for the delivery of the sheet thereto, said delivery arm substantially throughout its entire forward movement directing said grip in a descending path to clear the overhead magazine of the press.

7. Delivery mechanism comprising an element movable forth and back, a carrier member on said element, a hollow support having a suction grip thereon in communication with the interior of said support, a mounting for the support, said mounting comprising a hollow shank and a head thereon having a planiform face, the interior of said shank communicating with the interior of said support, said shank having a nipple for the attachment thereto of a suction hose, a screw issuing from said carrier member and threaded into the head of said mounting to secure the mounting to the carrier member, said carrier member having a head thereon formed with a planiform face facing said face on the head of said mounting, said mounting being adapted to turn on the threads of said screw upon the swingillg of the support from a substantially horizontal operative position to a substantially upright inoperative position, spaced abutments on the carrier member, a stop on said mountingengaging one of said abutments in the operative position of the support and engaging the other. of said abutments in the inoperative position of said support, said latter abutment and stop cooperating to render said support self-sustaining in an upright over-center relationship, the turning of said mounting on said screw to locate said support in its operative position serving to draw the face of the mounting against the face of the carriermem her, the reverse turnin of said mounting withdrawing the face thereof from said face of said carrier member. p

8. Delivery mechanism comprising an element movable forth and back, a carrier member on said element, 'a supporthaving a grip thereon-, .-a

mounting for said support, a screw revolubly carried by said carrier member and threaded into said mounting to secure the mounting to said carrier member, said mounting being adapted to turn on the threads of said screw upon the swinging of the support from a substantially horizontal operative position to a substantially upright inoperative position, spaced abutments on the carrier member, a stop on said mounting engaging one of said abutments in the operative position of the support and engaging the other of said abutments in the inoperative position of said support, said latter abutment and stop cooperating to render said support self-sustaining in an upright over-center relationship, the turning of said mounting on said screw to locate said support in its operative position serving to tighten said mounting against said carrier member, the reverse turning of said mounting loosening the same from said carrier member, said screw independently serving to tighten and loosen said mounting relative to said carrier member.

9. Delivery mechanism comprising an element movable forth and back, a carrier member on said element, a support having a grip thereon, a mounting for said support, a screw issuing from said carrier member and threaded into said mounting to secure the mounting to said carrier member, said mounting being adapted to turn on the threads of said screw upon the swinging of the support from a substantially horizontal operative position to a substantially upright inoperative position, spaced abutments on the car- I rier member, a stop on said mounting engaging one of said abutments in the operative position of the support and engaging the other of said abutments in the inoperative position of said support, said latter abutment and stop cooperating to render said support self-sustaining in an upright over-center relationship, said former abutment being adjustable to vary the operative horizontal positioning of the support, the turning of said mounting on said screw to locate said support in its operative position serving to tighten said mounting relative to said carrier member, the reverse turning of said mounting loosening the same relative to said carrier member.

10. Delivery mechanism comprising an element movable forth and back, a carrier member on said element, a support having a grip thereon, a mounting for said support, a threaded pivot connecting the mounting to said carrier member, said mounting being adapted to turn axially of said pivot upon the swinging of the support from an operative position to an inoperative position, the turning of said mounting to locate said support in its operative position serving, through said pivot, to tighten said mounting against said carrier member, the reverse turning of said mounting serving to loosen the same relative to said carrier member.

11. Mechanism for pneumatically delivering sheets from a platen printing press, said mechanism comprising an oscillatory delivery arm pivable cam-rail having a cam surface extending therealong, said swiveled carrier member having a cam-arm thereon coacting with the cam surface of said cam-rail, means for swinging the delivery arm to carry the suction grip to and from the platen for the removal of a sheet therefrom, means for moving the cam-rail, the cam surface of said cam-rail and the movement thereof combining in cooperation with said cam-arm to turn the swiveled carrier member, said second section of said suction conduit accommodating movements of said grip relative to said delivery arm, and said third section of said conduit, at that portion thereof adjacent to said pivotal axis, serving to accommodate the swinging movements of said arm.

ENEVAL KLUGE.