US1567372A

US1567372A - Sheet-separating mechanism

Info

Publication number: US1567372A
Application number: US588340A
Authority: US
Inventors: Arthur G Jacobson
Original assignee: Individual
Current assignee: Miehle Printing Press and Manufacturing Co
Priority date: 1922-09-15
Filing date: 1922-09-15
Publication date: 1925-12-29
Anticipated expiration: 1942-12-29

Description

Dec. Z9 1925- A. G. JACOBSON SHEET SEPARATING MECHANISM Filed Sept. l5, 1922 Pacman nee ze, 1925.

f UNITED. STATES yPATENT OFFICE.

ABTHUBVG. JACOIBSON, OF CHICAGO, ILLINOIS, ASSIGNOB TO MIEHLE PRINTING :PRESS & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLI- NCIS.

SHEET-SEPABATING MECHANISM.

Application led September 15, 1922. Serial F50. 588,340.

To all whom 'it 'may cof/wem:

Be it known that I, ARTHUR G. JaCoBsON, a citizen of the UnitedStates, residin at Chicago, in the county of -Cook and tate 5 vof Illinois, have invented certain new and useful Improvements in Sheet-Separating Mechanism, of which the following is a specification.

This invention relates to sheet separating X mechanism. 1

@ne object of the invention is to provide` simple, reliable and efficient means for separating the .top sheet in a pile from a second sheet therein and gripping said topi i sheetV for withdrawing same from the pile without causing the rst sheet again to engage the second sheet at the point where they are first separated. y

Another object of the invention is to separate' sheet material in a pile lin asimple and improved manner whereby when a ilxn of air once separates the top sheetl from a second sheet such film of air willnot be pressed from between'said sheets. I y

Another object is to provide sheet separating mechanism which is simple in operation and adapted -to meet the various requirements for the particular use.

,These vand other objects are accomplishedl 3o `by means of the arrangement disclosed on the accompanying sheet of drawings, in

. .which- Y Figure 1 is a fragmentary sectional view of sheet separating mechanism embodying my invention and also showing a pile of sheet material undergoing separation, the top ,sheets of paperl being iuii'ed up at one corner just prior to the top sheet of paper being'v vgripped *and Figure' 2 is a similar sectional view show- -ing the top sheet of material in the pile gripped by the Suction gripper. 4The various novel features. of the invention willbe apparent-from the following den scription and drawings, and will be articuseparation is a vital one in connection with printing and one which has been given considerable thought. Various sheet separatig mechanisms are in use with varying degrees of success. In certain types of sheet separators a portion of the top sheet in a pile is separated from the next sheet prelminarily by jets of air, whereupon a gripper, which may be one of various types, passes downwardly into engagement with said top sheet and continues 1n its movement until the separated portion of said top sheet backs down into engagement with the second sheet and thereby Jforces the separating medium or air from between the first and second sheets. The result of such action is tonullify .the preliminary separation.

In my arrangei'aent I propose not only to take advantage oft the preliminary separationcaused by iets of air, but to grip the top sheet after it is separated from the second sheet at one portion and to prevent saidA top sheet Jfrom again pressing down on said second sheet aty such se arated portion.

In connection with t e preliminary separation of the sheet material there is provided a iluliing, tube 11 through which air is forced for iuiiing one corner of the pile, as shown in the figures of the drawings. At the same time the top sheets are held down at another portion by a foot 12 to prevent accidental displacement of the top sheets. Cooperating with the hold-down foot 12 is another tube 13 through which a jet of air is directed upwardly between the top sheets oi material. Preferably the hold-down foot 12 and jet tube 13 are coupled together to cooperate in their actions. In this particular instance a band 14 surrounds the front portion of the jet tube 13 and has connected thereto a rod 15 which is adjustably connected to a collar 16 secured to the holddown foot 12 at an intermediate portion.

As mentioned above, after the top sheets lof paper are preliminarily separated, the

a cylinder 20, having at-its upper end a i tube 21 to which may be connected a hose or other flexible tube 22 connected to any suitable source of suction, not shown, whereby suction is extended through the

tubes

22 and 21, cylinder 2x), hollow piston 19, tube 18 and suction foot 17 for drawing and gripping the 1top sheet of material 23. Pivotally connected to the upper end of the cylinder at 24 is one arm 25 of a bell crank lever 26v pivotally mounted at 27 and having another arm 28 inthe end of which is a roller 29 operatively connected to a cam 30 which is rotated by any suitable means.- such as a shaft 31 upon which the cam is mounted. Accordingly, as the cam 30 is rotated the suction gripper mechanism is caused to rise and fall and is guided in vits rising and falling movement by a link 32, one end of which is pivotally connected to the suction tube 18, and the other end of which is pivotally connected to. any suitable support 33..

As shown in Figure 1 of the drawings, the roller 29A is on the high part of the cam 30 and, accordingly, the suction mechanism is in its elevated position.A As the roller passes from the high to lthe low part ot the cam, the suction mechanism is lowered so that the suction foot 17 is passed down into engagement with the top sheet of material 23. As soon as the top sheet 23 of material gripped by the suction foot 17 no more air can be drawn, upwardly through the sealed tube 18. However, the suction-force acts upon the piston 19 in a' manner to draw the piston 19 and accordingly the tube 18, foot 17 and paper 23 upwardly even as the cylinder 20 continues its downward movement. By virtue of the fact that the iston 19, tube 18 and suction toot 17 are rawn upwardly by the suction after the suction foot 17 is sealed, such suction foot 17 is not permitted to be pressed down to the solid pile of sheets as the cylinder 20 is lowered,

. since it is higher by the length ot the stroke of the pistonA and, accordingly, the separated portion of the top sheet 23 of material is prevented from being driven down into engagement with the next sheet. As a result thereof the separating body of air between the top sheetand the second `sheet is not disturbed and the separation of the top sheet from the second sheet is successfully maintained. Asmentioned above, this result is accomplished by the upward movement of the piston 19 within the cylinder 2Q as the latter moves downwardly, so that even though the cylinder 20 continues its downward movement during the gripping operation the suction foot 17, tube 18 and pis ton 19 move upwardly immediately upon the sealing of the suction toot 17 by the top sheet of paper.

asevera lt is my intention to cover all modifications of the invention falling within the spirit and scope of the following claims.

I claim:

1. In mechanism for separating sheet material in a pile, the combination of means for iuiiing sheet material in a pile, and suc- .tion gripper means comprising a plurality of relatively movable parts whereby when one of said parts grips the top sheet oi material it recedes with said sheet regardless of the movement of the other relatively movable part, whereby separation of the top sheet from the second sheet is maintained.

2. ln mechanism for separating sheet material in a pile, the combination of means.

for iuliing sheet material in the pile, and suction gripper means which is given a downward movement for gripping the top sheet of material and comprising a plurality1 of relatively movable parts whereby w en one of said parts grips the top sheet of material it recedes with said sheet regardless of the continued downward movement of the other relatively movable art, whereby separation of the top sheet trom the second sheet is maintained. v

3. In mechanism for separating sheet material in a pile, the combination of means for iiufiing sheet material in a pile, and vertically movable suction gripper `means having a downward movement for gripping the top sheet of material and comprising a plurality of relatively movable parts whereby when one of' said parts vgrips' the top sheet of material it moves vertically upward taking the top sheet of material with it as the other relatively movable part continues its downward movement whereby separation of the top sheet from the second sheet is maintained.

et. ln mechanism for separating sheet material in a pile, the combination of means for'fiufling sheet material in the pile, and gripper mechanism including an actuated cylinder connected with a source of suction, a piston slidably ymounted in said cylinder, and a suction gripper foot operatively connected to said piston whereby as said cylinder, piston and suction foot move in a given direction and the top sheet is gripped by said suction foot, said piston immediately moves in said cylinder in an opposite direction for withdrawing the top sheet of material regardless of the continued movenient of said cylinder.

h. ln mechanism for separating sheet material in ay pile, the combination ot means for uiiing sheet material in the pile, and gripper means including a movably mounted cylinder, a hollow piston movably mounted in said cylinder, a suction toot operatively connected to said piston whereby said cylinder, piston and suction foot all move in the same direction until the suction foot is sealed by the top sheet of material and Without passing solidly into engagement with the pile, whereupon said piston moves in an opposite direction in said cylindercarrying wit-h it the suction foot and top sheet of material independently ofthe movement-of said cylinder, whereby separation of the top sheet from the second sheet is maintained. a

6. In mechanism for separating sheet ma'- terial in a'pile, the combination of means for fluliing sheet material in the pile, means for preventing accidental displacement of the top sheet of material as it is being lluted, and gripper means comprising a plurality of relatively movable parts whereby when one of said 'parts grips the top sheet of material and without passing solidly into engragement with the pile it recedes with said sheet regardless of the movement of the other relatively movable part whereby separation of the top sheet from the second sheet is maintained.

Signed at Chicago, Illinois, this 18th day of August, 1922.

ARTHUR Gr. JACOBSON.