US1025418A - Delivery mechanism for platen-presses. - Google Patents

Description

-L. E. MORRISON. I DELIVERY MECHANISM FOR PLATEN PRESSES.

APPLICATION FILED MAE.6, 1908.

Ptented May 7, 1912.

2 SHEETS-BHEET 1.

W lu-vewfoz ash,

P1 91 fmomco' 45" L. E. MORRISON.- DELIVERY MECHANISM FOR PLATEN PRBSSES'. APPLICATION FILED MARfi, 1908-.

1%025A18, Patented May 'F, 1912.

2 SHEETS-SHEET 2.

amvemfoz 'UNrrED s'raiggns PATENT OFFICE.

LEWIS E. MORRISON, or NEWARK, NEW JEn-sEY, ASSIGNOR T0 HIMSELF AND ivm'rrnms PLUM, or NEWARK; NEW JERSEY.

DELIVERY MECHANISM FOR PLATEN-PRESSES.

Specification of Letters Patent.

Application filed March 6, 1908. Serial No. 419,480.

Patented May '7, 1912.

T 0 all whom it may concern.

Be it known that I, LEWIS E. Monnisoiv, a citizen of the United States of America, and a resident of Newark, Essex county, New Jersey, have inve ited certain new and useful Improvements inDelivery Mechanism for llaten-Presse's, of whichthe following is a specification.

This invention relates to delivery mechanism for printing machines and more particularly to a delivery mechanism for use on platen presses having a movable or oscillating platen. Such machines are generally called job presses and the sheet or other matter to be printed is fed to the platen by hand and also removed by hand, so that the speed of the press is dependent upon that of the operator.

The present invention enables the operator to confine his attention to the feed only, hence the machine can be run faster and accidents are not so liable to occur, as when the operator is compelled to put both hands on the platen at the same time.

The invention comprises a gripper mechanism forseizing and removing the printed sheet from the platen, and such other elements or parts as are necessary tdbperate the grippers; it should be noted, however, that one of the main advantages and features of this invention resides in the fact, that it can be applied to the press very quickly, and does not demand any changes in the original construction thereof.

In th following specification this-invention is fully disclosed, and the accompany-- ing drawings illustrate the preferred form thereof. 7 y

In the said drawings Figure 1 is"a side view of a platen press with one of the side frames removed and equipped with a delivery mechanism embodying my invention;

' Fig. 2 is a front view showing the gripping of the grippers detached.

mechanism;.. Fig. 8 is an enlarged perspective view of one of the grippers and adjacent parts; and Fig. 4: is a side view of one Referring more particularly to Fig. l, the reference numeral 1 indicates the side frame of the press, the oscillatingform carr-ier, which is operated by connecting rod 3 pivoted to gear 4:, which is driven by pinion 5 on the driving shaft 6.

7 is the platen which is oscillated in the usual manner to cooperate with the forum member.

In Fig. 1 the press is shown open or ready to receive the sheet in full lines; and in dotted lines are shown the positions of the different parts when the impression is on.

The parts so far described are found on all presses of this type and I need not go into detail about the various parts or their operation, as these things are well known in the art and form no part ofv my invention.

On the frame of the press are mounted two brackets 8, 8 which support a feed table 9 upon which are placed the sheets to be 11, one on each, side, which are joined by thegripper bar 12. This latter'is provided with slots 13 so that the grippers can be adjusted transversely and fastened by bolts 14, see Fig. 4i The carriage is reciprocated by means of the oscillating. arms 15, 15 pivoted on shaft .16, which is mounted in braclrets 17. One of the arms 15 carries a short arm 18 which is connected at 19 to the connecting ing rod reciprocates the arms 15 oscillate on the shaft 16, and the gripper carriage is reciprocated toward and awayv from the platen. The arms'15 are connectedfto-the slides 11 by slots 21 and studs 22; see Fig. 3.

The grippers are guided by havingtheslid'es 11 slide on the arms 23, 23, which are PIV':

otcd at 24: onthe brackets 8 and whieh .,fol-

low the movements of the, platen by resting on the rollers on each side. I

The illustration shown in Fig. l of the gripper motion can now be understood. The.

grip ers are there shown in full lines as havmg 0 osed on a sheet on the platen and in 25 fastened on the latter, one

I rod 3 by the lever 20, so that as the conneot- 'See Fig. 3.

dotted lines is shown the extreme forward position of the arm 15 and the gripper car'- riage and grippers. The short arm 18 is.

lower gripper jaw 26 which. rear end is thinned down as at 27 to enable it to pass close over the surface of the platen and under the printed sheet, it being understood,

that the latter is usually raised slightly from' the platen by pasting a piece of paper or ca. "5. board on the latter. The upper gripper jaw 28 is pivoted on the lower one at 29 and is also thinned as shown. The tail portion 30 of the upper gripper jaw is raised above the lower jaw and a spring 31 presses against this raised portion and tends to keep the grippers closed. At the rear of the lower aw is mounted a sliding member 32 provided with a slot- 33 and guided in its movements by the pins 34, which latter are fast in the lower jaw and which. limit the motion of the slide 32. A spring 35 exerts a steady pull on the slide toward the upper gripper jaw. A gripper closing member 36 is carried by the slide 32 by being held by friction in the split sleeve 37 of the slide. The lower gripper jaw is provided with a slot 10 to admit of adjustment at right angles to the bar 12.

The grippers are opened by means of a rod 38 which extends across the machine and is carried by lugs 39 having slots 41 so that the position of the rod 38 may be adjusted. The lugs 89 are fastened to the arms 23 and move therewith; only the parts on the one side are shown, as they are alike on both sides. Attention is called to the positionsof the uppergripper jaw in Figs. 3 and 4. In the former the gripper is shown open, in the latter the gripper is closed.

The operation is as follmvs: Suppose that the press is open and that the operator is placing a sheet upon the platen,the positions of the various parts will then be as shown in. full lines in Fig. 1. The platen now moves down, coacts with the form and the sheet is printed',see dotted lines Fig. 1. As the platen returns with the printed sheet, the grippers are moved toward it, each gripper being in the position shown in Fig. 8, in which it should be noted that the upper jaw 28 is held open by reason of the fact that the slide 32 overlaps the tail 30 of the upper jaw, the spring 35 holding the slide in this position. In other words, when the grippers move toward the platen, they .are open. The parts are so timed, that the have passed between the platen and the printed sheet. At this moment, however, the member 36 will abut the edge of the platen and is forced back carrying the slide 32 with it, thus releasin the upper gripper jaw, which by reason 0% the spring 31v will close'onthe sheet, and is also held closed by the slide 32, which abuts the tail 30 by the force of the spring 31 as see'n in Fig. 4. The platen now commences its rearward stroke, and the grippers remove the sheet therefrom. It should he noted, that/the grippers do not pull the sheet from the platen by a movement parallel to the surface thereof, but as the grippers withdraw, they are also raised by the arms 23 and the removal of the sheet takes place quicker, giving the operator ample time to place a fresh sheet on the platen, before the latter moves dmvn.

. Almost at the endof the forward stroke of the gripper, the upper jaw will encounter the rod 38, as shown in Fig. 4, and as the grippers continue to move forward the tail. 30 will be depressed by the, rod 38, gently opening the grippers until the tail. snaps under the end of the slide and the grippers are fully opened and the sheet has been dropped in the receptacle 50. The operation is now repeated and the grippers moved rearward in; order to remove the next sheet from the platen, and it will be seen. from Fig. 4 that the open gripper will pass under the rod-38 without contacting therewith.

The following facts should be kept in mind for fully understanding the above described operation. The motion of the grippers is rectilinear on the oscillating :HIllr; 23 by reason of the pin and slot conneellmis between the said arms and the swinging arms 15, so that the grippers partly raise the sheet in. removing the same from the platen, this gives the operator ample time to feed a fresh sheet to the press. lit has also been stated that the gri 'ipers are adjustable transversely on and at right. angles to the liar l2, and the grippers may be tired to reach way in on the platen to grip a small card, or they may be :nljusled to just overlap the edge of the platen to seize a large sheet. Corresponding with the position of the grippers will be the position of the closing member 36. lf a small card or envelop is printed, the grippers must reach far in over the platen in order to seize it. consequently the member 36 will be pushed closer to the bar 12 to close the El'l'llllltlS later than when a large sheet is handled,

in which instance the member I36 will be adjusted to close the grippers early. ll. however, the member 36 should be ad usted too far away from the bar 12 and hitslhe platen llli ' the sleeve holds the member'36 fast enough, i so that it will perform its function when properlyv adjusted. Inasmuch as the grip- :pers may assume different positions with 9 relation to the bar 12, it will be clear. that the opening rod 38 must be adjustably ear-- ried in the lugs 39, so that the grippers will be opened at the proper time to deposit the sheet.

This invention is thought to be clear from the foregoingand .it will be seen that it is readily put on the press and that the constriction'of the latteris not changed, also that t? e delivery takes place under the feed table and the printed-sheets may easily be removed. v

I donot limit myself to the exact form shown,-as changes may bemade within the scope of the claims. i

I claim: t i 1. The combination of a platen press having a movable platen, delivery grippers,

means carried by the said delivery grippers tor closing the same by contact with the said platen, guiding means for said grippers and means mounted on the said guidxing means for opening the delivery grippers at a predetermined point.

2. A delivery gripping mechanism for platen presses comprising a pair of oscillating levers, grippers mounteslto reciprocate on said levers, means for closing said grip; pers, means for opening said grippers the said opening means being adjustably mounted on the aforesaid oscillating levers.

3.;A delivery gripper to. printing ma chines-comprising a lower gripper jaw, an upper pivoted gripper jaw, means interposed between the said 'jaws forv normally closing the same, a spring actuated sliding member for keeping the upper jaw in. open position during. given periodsand means carried by said sliding'mmber .for closing I scr bed means, a gripper carriage movable on said the said gripper. 7:

4. Agripping mechanism, of the class de comprising oscillating guiding guiding means, grippers carried by thesaid CHI'I'ItIgG, means 'carr1age,means=for adjusting the said grippers'transversely .onthe said carriage and atrright angles thereto, means for closingthe said grippers and means for opening 'thesame.'f v

5. A gripping mechanism of the class described comprising oscillating guiding means,-a gripper carriage movable on said guiding means, g'rippers carried by the said foradjusting the said grip pers transversely on the said carriage and ,55; ai right angles thereto, means for closing the s'afid grippers and means for openingthe same, the said opening maiisbein'g carried by the said guiding means.

6. The combination with 'a platen press having a movable platen, pivoted levers adapted to co-a'ct with said platen, a gripper carriage slidably mounted on said levers,

and means for opening saidgrippers adjustably carried by the said levers.

7. The combination with a, platen press having a movable plat-en, pivoted levers. adapted to be oscillated by said platen, dclivery grippers movably supported by the said levers, means carried by the said grippers for closing the same by contact with 'the said platen, means for reciprocating the said grippers and means carried'by the said levers for opening the said grippers 8. The combination of a platen press having amovable platen, a movable form member, delivery grippers, means interposed between-the said form member and the said grippers for reciprocating the latter and means interposed between the said platen 9. The combination of a platen press having a movable p'laten,fia pair of pivoted levers, means for oscillating the latter by the said-platen, a gripper carriage supported 'ria e and at ri ht an les thereto a movable b D D levers by the said form member and means carried by the said pivoted levers for open' 'ing the said grippers.

j 10. A gripping mechanism of the .class described comprising oscillating guiding means, a gripper carriage slidably supported on the said means, grippers carried by thereon. rv 12. The combinatiqn'of a platen press comprising an uppers and a lower gripper aw, ashde for looking the upper gripper aw.mnpengposition, a springfor causing siid sliidetrowiact and a member carried bygrippers on said carriage, means for closing said grippers by contact with the said platen said carriage, means for adjusting the said.

grippers toward and away from' the said guiding means, and means for ad ust-ingthe the said guiding means and adjustable and the said grippers for oscillating the I by the said levers, means for adjusting the said grippers transversely-' upon said carform member, means forreciprocating the said gripper carriage on the said pivoted having a movable pIaten, delivery grippers ia o said gripper by conplaten to force the the pull of the said said slide for closing taeting with the said said slide back against spring.

13. The combination of a platen press having a movable platen, delivery grippers comprising an upper movable and a lower fixed gripper jaw, a slide carried by the said lower for locking the upper jaw in open position, a spring for causing the said slide to-act and a member frictionally carried by the said slide for closing the said upper gripper jaw by contacting with the platen to force the slide back against the pull of the said spring,

14. A gripping mechanism for printing machines comprising a reciprocating carriage, grippers thereon and consisting of a fixed lower Jew and a movable upper jaw, a Slldlflg member carried by the said lower movable members,

jaw, a spring interposed between the'latter and the said slide, a ineniber held in i'rictional contact with the said slide and adapted to force the latter away from the said upper gripper jaw to close the same.

15. The combination of a movable platen, movable members eoacting with the same, a gripping mechanism carried by the said other members held in frictional engagement with the said gripping mechanism and adapted to eoact with the platen to close the grippers and means for reciprocating the said gripping mechanism.

Signed at Newark, N. February 1908.

J. this 29th day of as LEWIS E. MORRISON.

Witnesses v Cn'As. E. DANIEL, FREDERIG J. ARNOLD.

Images