US992826A

US992826A - Sheet-delivery mechanism.

Info

Publication number: US992826A
Application number: US55991510A
Authority: US
Inventors: Burt F Upham
Original assignee: Individual
Current assignee: Miehle Printing Press and Manufacturing Co
Priority date: 1910-05-07
Filing date: 1910-05-07
Publication date: 1911-05-23
Anticipated expiration: 1928-05-23

Description

B. F. UPHAM; SHEET DELIVERY MECHANISM.

APPLICATION FILED MAY 7,1910.

Patented May 23, 1911.

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' Wiinmow B. F. UPHAM.

SHEET DELIVERY MECHANISM.

APPLICATION FILED MAY 7,1910.

Patented May 23, 1911.

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SHEET DELIVERY MECHANISM.

APPLICATION FILED HAY 7,1910.

Patented May 23, 1911.

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BURT F. UPHAM, OF CHICAGO, ILLINOIS, ASSIGNOR TO MIEHLE PRINTING PRESS AND MANUFACTURING GOMPAN Y, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SHEET-DELIVERY MECHANISM.

lowing is a full, clear, and exact description thereof, reference being had to the ZICCOIII, panying drawings, which form part of this specification.

This invention is an improvement in sheet delivery mechanisms, and particularly designed for use with sheet printingpresses.

" Theobject of the invent-ion is to bodily transfer the sheets from the press tapes to the receiving table without the use of tapes,

' and withoutany possibility of smearing the sheets by the action of thetransfer devices. The invention consists in novel means adapted to grasp a sheet by its side marginsas it is brought forward by the press tapes, and then bodily carry said sheet away from the tapes to and over the receiving table and then release the sheet and allow itto drop gently onto the table. The said means embodies novel devicesor carriers adapted to seize or grip the opposite edges of a sheet along its outermost margins, and preferably substantially the entire length of the sheet,

or at least so much thereof as will enable the sheet to be bodily suspended by andbetween such devices also means for reciprocating such sheet seizing devices from beside the press tapes to the point of dropping the sheet; the parts being so constructs ed that in the operation of the apparatus the devices will engage the margins of a sheet while it is lying on the press tapes; and will be closed thereupon while the sheet carriers are traveling outward at approximately the same rate of speed as the press tapes are moving lineally, so that the sheet will not be jerked or tornin transference from the tapes .to the carriers. The 'sheet will then be firmly held and carried to the point of dropping, and there be released simultaneously by the seizing devices; and then the carriers are returned beside the press tapes in position to take another sheet therefrom. Means are also provided for causing the sheet engaging devices, or sheet holding devices on the carriers, to close and open at the proper times to take and to discharge the sheets.

Theinvention may be embodied in vari- Specification of Letters Patent.

Application filed May 7, 1910. Serial No. 559,915.

Patented May 23, 1911.

ous mechanical forms; and I have illustrated in the accompanying drawings one construction; but I do not consider the invention in its general features limitedto such specific embodiment thereof and I refer to the broader claims for general summaries of the essentials of the invention for which protection is desired.

Figure 1 is a side elevation of a printing press with sheet carrier in receiving POSI- tion. Fig. 2 is a plan view of the same, parts being broken away, and the carriers in position to delivera sheet. an inside elevation of the delivery end of the press showing the carriers in the delivering position. Fig.4: is a reverse plan view of Fig. 3. Fi 5 isan inside elevation of the receiving en of machine showing the grippers in position to take a sheet from the tapes. Figs. 6 and 7 are detail sectional views taken on lines 66 of Fig. 3 and 7-7 of Fig. 5. Figs. 8 and 9 are detail views.

In the drawings, A designates the cylinder of any suitable sheet printing press;

and B, B, the usual press tapes, which are adapted to receive the printed sheets from the impression mechanism and forward themtoward the receiving table. Each printed sheet-is moved outward edgewise by the tapes B, B, and I propose to seize the margins of the sheet, as it is carried on tapes B,

gins and transport it from the tapes B, B, to and over the table-C, and drop it thereon. In the construction shown in the drawings two opposite parallel guide-bar's 10 are arranged between the side frames of the press, and may be supported on cross rods or

shafts

10, 9, mounted in the side frames. The guide-bars 10 are shown as lying in a horizontal plane intermediate the shafts b, b, of the upper and lower sets of tapes B, B, andthus extending beyond the same to the endof table 0.

Slidably mounted upon each guide bar 10 is a carrier 3, whichis ada ted to bereciprocated from a position besi e the tapes B, B, (see Figs. 1-5) to a position beside and above the table C (see Figs. 2-3-4). The carriers 3 may be reciprocated properly and simultaneously by any suitable means, and may bemounted upon the bars 10in any suitable manner. As shown each has a slidingfit upon its guide-bar, and is provided Fig. 3 is I y suitable reciprocating devices, wh1ch wlll uphold the sheet by its side marbeside said tapes and on its under side with a rack 3 which is adapted to engage with a pinion 5 on a cross shaft 5, journaled in the side-frames of the machine adjacent the outermost taperoll shaft; and said shaft 5 is adapted to be rotated alternately in opposite directions by means of a small pinion 5 on its outer end meshing with a rack bar 4, supported in a guide 4 pivoted on the side frame adjacent the pinion 5; and said rack bar is connected by a rod fi to a lever 4* having a roller 4? engaging a .cam 4 mounted on a shaft 4 suitably geared to any driven shaft (not shown) in the press, so that the carriers 3 will be reciprocated once for each sheet printed in the press. The ordinary press prints one sheet for each rotation of the impression cylinder A. The cam l is preferably so shaped that after the carriers reach their innermost positions, indicated in Fig. 5, they are started outward gradually but quickly attain the speed of the tapes B, B, whereupon the sheet-tapes or grippers, hereinafter described, seize the sheet by its side margins, and, as the carriers move on, carry such sheet to and over the table C. As the carriers near the end of their outward stroke they are slowed down and just as or before they are stopped, the grippers release the sheet. Then the carriers move back beside the tapes to take another sheet." The cam, rack, and pinions 5, 5, can be made of such relative proportions that a' sufiicient movement can be given the carriers by a comparatively short movement of the rack bar 4.

It will be seen by reference to Fig. 7 that the sheet takers on the carriers engage the sheet by its outermost side margins, and will hold the sheet suspended between the carriers while transferring it to the table C. Instead of'as heretofore'taking a sheet by its forward and leading edge and pulling it outward, the reciprocating grippers in my invention take the sheet only by its side edges and when it is released it is free to drop simultaneously throughout its length, and one part or end of the sheet is not dropped in adv nee of another part thereof.

A practical cm of sheet-taking or gripping devices is illustrated in the drawings, and comprises a pair of upper and lower gripper bars 1", 2", attached to each carrier 3. The bar l -preferably hasa slight vertical movement, as hereinafter explained, and for this purpose may be hung at its ends upon links 1 pivoted at 1 on lugs attached to carrier 3; the links 1 are similarly inclined, and as the carriers reach their innermost position a pin or roller 1 on an;

arm 1 connected with the innermost link 1 engages a cam 1 attached-tothe guide bar 10 (or other suitable-support on the machine),-and causes the'bar 1 to slightly rise (see Figs. 1-5-7). The cams 1 may be so shaped and arranged as to hold the bars l lifted slightly for any desired portion of the stroke of the carrier; or until they are i o lrging outward at the speed of the tapes The bar 2 underlies bar 1 and normally remains parallel therewith, but is adapted to be reciprocated laterally; and for this purpose it may be slidably mounted on guides 2*,on carrier 3, and be provided with pins 2* on its under side which engage the slotted arms of bell-crank levers 2 pivoted at 2 to the under side of the carrier 3; the short arms of said levers are connected by a bar 2 so that, said levers must move simultaneously and equally, and when said levers are rocked they will move bar 2 laterally; and may be caused to move said bar 2 from a position parallel with and below the bar (see Fi g. 7) l ,which is the sheet receiving and gripping position, outwardly from beneath bars 1 (see Fig. 6) which is the sheet dropping position. i

'1 he bars 2 may be moved to sheet dropping position, as or when the carriers reach the end of their outward stroke, by means" of rollers or studs 2 connected to the outer most levers 2 and adapted to engage cams 2 attached to the guide bars 10; or an adjacent-support on the frame, as indicated in Fig. 4. And when the carriers start inward again the -cams 2 will cause bars 2* vto return to position underneath bars 1. 'If desired bars l might be made to rise slightly to release the edges of the sheet, as or when the carriers reach the limit of their outward stroke and before the bars 2 are retracted, by means of cam 1 attached from each other. As the carriers operate beside the tapes,and not merely at the ends thereof,-the tape pulleys on the shafts b, b canbe shifted laterally to or from each other to permit the carriers to be properly adjusted so that the sheet seizmg devices can engage the margins of any sheets of any size. The outermost tapes B, B, being so adjusted as to allow theslde margins of such sheets to project therefrom sufficiently to enter between the bars 1, 2, on the carriers, while said bars are separated; said bars serving for the time be ing-when the carriers are in their innermost positionsas guides and supports for thus the bars 10 can be adjusted toward or the outermost margins of the" sheet. The

cams

1 and 1 for operating bar 1 ;-and the sheet brought forward thereon will project- 'slightly beyond ,the outermost tapes. The

guide bars are adjusted to posit-ions close beside the outermost tapes so that when the 1 carriers 3 are moved inward beside the tapes the outermost side margins of the sheets lying on tapes B will enter between the then separated bars 1?, 2". After a sheet is therebetween only by, its side margins,to and over 'table 0, and when the carriers near or reach the end of their outermost stroke, and come to or almost to a stop, the cams 1 may cause bars 1 to slightly rise and simultaneously the pins 2* engaging cams 2* cause the bars 2 to. Withdraw from beneaththe outermost margins ofthe sheet, and thus the sheet is freed simultaneously at 40 both margins, all along its length, and can drop freely. onto the table C;while' the carriers are immediately -returned toward the tapes into position to receive another sheet.

. Obviously the invention is not restricted to the'particular construction'of parts heree in shown and described, nor to the particular arrangement of cams and devices for operating any of the parts of the invention, as, being once disclosed it could be readily embodied in various fornis of mechanism point of deposlt; with devlces for causing without departing from the essential features thereof, the broad characteristic' fea- 'ture ofthe invention being the employment of reciprocating, carriers or grippers adapted to seize asheet by its outermost side margins and carry the sheet suspended therebetween to the point of delivery, and

there let it drop.

'What I'claim is:

' ing presses, opposite-reciprocating carriers each provided with upper and lower gripping bars extending longitudinally of a sheet and adapted to engage the side marabout fully entered between bars 1 2 on' is taken by the carriers,while 'suspended' 1. In sheet delivery mechanism for print gins thereof'as it is brought forward on the press tapes, and bodily transport the sheet to the dropping point; with means for causing the bars to seize and to release the sheet at the proper points.

: 2. In sheet handling mechanism, the combination of a set of sheet forwarding tapes,

a pair of reciprocating carriers, one at each side of the set'of tapes, means for reciproeating said carriers, and a pair of sheet gripping bars on each carrier extending longitudinally of the tapes and adapted to engage the side margins of a sheet as it is brought forward on the tapes andbodily transport the'sheet to the droppingpoint; with means for causing the bars to seize and to release the sheet at the proper points.

3: In sheet delivery mechanism for printing presses, the combination of sheet forwarding means; a pair of reciprocating carriers located onopposite sides of said means, and sheet gripping devices on each carrier comprising a lower bar and an upper bar extending longitudinally of. the sheet and adapted to nip the adjacent side margins of a sheet brought forward by said means, take the sheet therefrom and carry it to the point of deposit; and means for causing the said bars to nip the sheet and to release the same at the proper times.

4:. In sheet'delivery mechanism for printing presses, the combination of sheet forwarding means; a reciprocating carrier at each side of said means; and a pair of sheet gripping bars on each carrier extending longage the adjacent side 'margins of a sheet and transfer it from the forwarding means.

to the point of deposit; with means for causing the bars to nip the sheet, means for separating the bars to release the sheet, and means for withdrawing the lower bars from beneath the sheet at the point of deposit.

. 5. In sheet delivery mechanism for printing presses, the combination of sheet forwarding tapes; carriers at opposite sides of the tapes, means for moving said carriers, and upper and lower movable bars on each carrier adapted to engage the adjacent side margin of a sheet supported on said tapes while it is moving, and to transport it to the the bars 'to separate to receive the sheet, to then close upon the sheet, and to again separate to release the sheet at the proper times and points; and means for withdrawing the lower bars from beneath the sheet at the point of deposit.

6. In combination, sheet forwarding means; with opposite pairs of gripping devices adapted to grip the opposite side margins of a sheet as it is brought forward by said means, and suspend the sheet bodily therebetween and carry it to the point of deposit during the outward stroke of the grippers; means for causing the grippers to release the sheet at such point, means for laterally withdrawing the lowermost grippers from beneath the edges of the sheet to permit the latter to drop freely, and means for reciprocating the grippers to and from the dropping point.

7. In combination, sheet forwarding tapes, and a sheet receiver, pairs of sheet gripping devices at opposite sides of the tapes, means for reciprocating the grippers between the sheet forwarding means and the receiver, and means to cause said grippers to engage the side margins of a sheet supported on said tapes, and transport said sheetfrom the tapes to and over the sheet receiver, means for causing the grippers to release and drop the sheet at such point; and means for withdrawing the lowermost grippers in each pair from beneath the sheet at the dropping point.

8. In sheet delivery mechanism for print said carriers, and transport the sheet from the tapes to and over the table; with means for-causing the gripping devices to close upon and release the sheet at the proper times; and means for withdrawing the lowermost grippers in each pair from beneath the sheet when above the table.

In testimony that I claim the foregoing as my own, I affix my signature in presence of two witnesses.

BURT F. UPHAM. Witnesses:

R. M.-MARKEL, GEORGE MASON.