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Publication numberUS3547279 A
Publication typeGrant
Publication dateDec 15, 1970
Filing dateDec 9, 1968
Priority dateDec 9, 1968
Publication numberUS 3547279 A, US 3547279A, US-A-3547279, US3547279 A, US3547279A
InventorsRadomski Joseph E
Original AssigneeSouthworth Machine Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dual inverter for counted stacks of sheets
US 3547279 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

United States Patent {72] Inventor Joseph E.Radomski Saco,Maine [21] AppLNo. 782,148 [22] Filed Dec.9,1968 [45] Patented Dec. 15, 1970 [73] Assignee Southworth Machine Company Portland, Maine a corporation of Maine [54] DUAL INVERTER FOR COUNTED STACKS 0F SHEETS 12 Claims, 4 Drawing Figs.

[52] U.S.Cl 214/1, 198/33 [51] lnt.Cl. ..B65g69/00 [50] FieldolSearch l98/33R3, 33R4;2l4/1R,1A.B., 1,310-314 [56] References Cited UNITED STATES PATENTS 1,677,290 7/1928 Parker 24l/l(R)UX 2,160,581 5/1939 Behnke 2l4/l(R)X 2,277,310 3/1942 Engelhart 2l4/1(R)X 2,774,487 12/1956 Rounsefelletall. 2l4/1(R) 2,836,282 5/1958 Rompre 2l4/l(R)X 2,984,364 5/1961 Lamb 2l4/l(R) Primary ExaminerGerald M. Forlenza Assistant Examiner-F rank E. Werner Attorney-Pearson & Pearson ABSTRACT: An inverter for sequentially inverting portions of stacked and counted piles of paper. A paper trimmer may thus be used to full load capacity with each trim, the inversion of each lift of untrimmed sheets, prior to trimming, retaining the count in the stack of trimmed sheets. The machine is so constructed that two knifeloads of paper can be stored in the same floor space as used for one knifeload in prior art devices. This result is accomplished by mounting two power actuated, movable clamping members each on an opposite side ofa fixed central clamping member within a rotatable inverter frame. The lift-supporting faces of all members are flat, smooth and planar whether air cushion or belt. There is a paper-receiving passage between each movable clamping member and the fixed central member, an endless conveyor on one member in each passage, and the inverter is so operated that one lift of paper may be received in one passage at the same time another lift of paper is discharged from the other passage.

PATENTEU UEBVII 5 mm 547279 SHEET 1 BF 2 22 @5 E O g 34 INVENTOR. Joseph E. Rudomskl *Emmm ATTORNEYS PATENTEU new SIBYG SAT.

SHEET 2 OF 2 Fig. 4

INVENTOR. Joseph E. Rodomski BY RNEYS DUAL INVERTER FOR COUNTED STACKS OF SHEETS BACKGROUND OF THE INVENTION In processing paper and like material of a flimsy-sheet construction, it is often desired to further process paper which has been stacked and counted.

One such situation is when paper is to be unstacked by the ream, or lift, from a counted, marked stack before entering a paper-trimming apparatus. Heretofore, it has been necessary to unstack an increment of paper which is exactly equal to one ream, or multiple thereof, for example, a team of 500 sheets, at a time, using tags at each 500th sheet asguides. In such a situation, considerable trimmer capacity is likely to go to waste. For example, suppose the guillotine trimmer has a 7 inch receiving section, i.e., is capable of handling a 7 inch thick stack of paper. Suppose further that a ream of the paper being handled is 2.5 inches thick. In th'ese'circumstances, the trimmer will only be loaded with two reamsof' paper because it is the largest number of full reams that can be put into the machine by using the visible guide tags. Thus only 5 inches of the 7 inch throat is utilized and nearly 30 percent of the true capacity of the machine is wasted. i

when the inverter of this invention is used, a partial ream load, or lift, can be processed, because'the first sheet of the next following load will be'discharge'd from the inverter in a sequence immediately following the sheet which was adjacent to the first sheet in the original stacked and counted pile.

It is, of course, necessary to maintain thecount, yet to do so with apparatus as inexpensive and simple to maintain as possible. When large sheets of paper are to be processed, it is particularly important that the apparatus be reasonably compact sothat it takes as little floor space as is possible.

SUMMARY OF THE INVENTION Therefore it is an object of the invention to'provide an improved inverter suitable for use in processin'g successive individual lifts of paper and like flimsy sheet materials.

It is another object of the invention to provide an inverter which has a high capacity per unit time-and requires relatively little floor space.

Another object of the invention is to provide an inverter which tends to remove air entrapped between paper sheets and thereby further augment its capacity.

Other objects of the invention will, be obvious to those skilled in the art on reading this application.

The above objects have been achieved'by the construction of a novel inverter comprising an elongated inverter frame which is rotatably mounted for movement through an angular distance of I80 around a central longitudinal axis. A pair of elongated movable clamps are adapted for compressively holding a lift (or ream) of paper against a centrally positioned surface with side guides while inversion takes place. Preferably the central surface is an air table and the movable clamping members include endless conveyor belts for moving the reams into and out of the inverter.

However, in some embodiments of the invention, the centrally positioned clamping surface can be a dual-faced conveying surface (for example an endless belt adapted for two-way operation) and the air surface can be on the paper-contacting face of the movable, paper-positioning, clamping members.

FIG. 1 is an end elevation, partly in section, of the inverter of the invention.

FIG. 2 is a diagrammatic view, on a the stabilizer means.

reduced scale, showing FIG. 3 is a side elevation, partly in section, of the inverter includes an elongated frame 21, supported for turning through I an angle of 180 on. a base 22 by the single, partly circular .wheel 23 and the central hollow bearing 24 gated, dual-faced, table 25, fixed along the central longitu-- dinal axis 29 of the frame 21, which forms a pair of loadreceiving passages 26 and 27, each on an opposite side of the axis. It is thus possible to eliminate one of the conventional wheels and rely on a single wheel 23, plus the upstanding base member 28 in which the hollow bearing 24 is journalled for rotation. It will be obvious that two wheels canbe used if desired. I

The wheel 23 is rotatably supported in a pair of friction rolls 31 and 32, the rolls being driven by sprockets 33 and chain 34 from a reversible motor and reducer 35 in a known manner, so that the wheel and frame are tumable through a half circle.

Preferably the fixed table 25 is of the air flotation type with opposite upper and lower lift support faces 36 and 37, each having a multiplicity of air apertures, 38 or 39, fed by transverse hollow conduits 42 or 43. The hollow conduits 42 and 43 are each connected to one of the opposite ends 44 or 45 of a plenum 46, the plenum being connected centrally through hollow bearing 24 and hollow upright28 to a source of air under pressure, such as the air pressure blower 47, carried on base 22, or to mill air supply.

Valve means in the form of a ball 51, valve seat 52 and inclined ball track 53 are provided in each end 44 or 45,'of plenum 46 so that the ball 51 will roll down the track 53 by gravity to close seat 52 and shut off air to the apertures of the lower face each time the inverter frame is turned. Thus full air pressure is emitted from the upper face air outlets 38, to air float a lift being received on the then upper lift support face 36 or 37 and no pressure is lost through the lower air outlets, not then being used.

A pair of elongated movable clamps; or jaws, are mounted in inverter frame 21, each clamp 54 or 55 having a paper-positioning surface 56 or 57 substantially coextensive in area with, and in parallelism with, the adjacent face 36 or 37 of the fixed air flotation table 25. Preferably,'each surface 56 or 57 is a conveyor surface formed by an endless belt such as 58 or 59, trained over a multiplicity of belt-carrying rolls 60 or 61, the end rolls 62 or 63 of each set being crowned to prevent side creep of the belt and being a drive roll,'rotated by one of the drive motors 64 or 65. It will be noted that no tracks rollers, pallets or trays are used in the inverter 20 of the invention, the lift of counted sheets being contacted and supported only by the flat, smooth, planar, lift support faces 36, 37, 56 and 57, to avoid damage or marking of limp lift of limp sheets.

The drive motors 64 and 65 are preferably reversible and it will be seen that the dual passages, or zones, 26 and 27, are each thus defined by a fixed, inner, air flotation face 36 or 37 and a movable, outer, power belt, conveyor surface 56 or 57, all en extending from one end 67 to the other end 68 of the frame 21. Flexible conduits 69 and 70 connect motors 64 and 65 to fixed table 25 for connection to the control system 71 of I the inverter.

The frame 21 is skeletonized and consists, in general, of the upper rectangular, horizontal frame 72, the lower horizontal frame 73, and the central table 25, these all being fixed and immovable relative to wheel 23. A pair of upstanding frame pieces 74 and 75 fixedly connect one end 67 of the frame and a second pair of upstanding frame pieces 76 and 77 fixedly connect the other end 68 of the frame, these frame pieces 74, 75, 76 and 77 being gear racks.

Two-way stabilizer means 78 (FIG. 2) is provided in the form of pinion gears 79 on each opposite side of each end of each movable clamp, which gears are enmeshed in their respective gear racks. The gears 79 on each opposite side are each fast to a transverse shaft 80, and the shafts at each end of each clamp carry sprockets 81 connected by a longitudinally extending chain 82. Thus the clamp members remain in parallelism and cannot tilt as they move toward and away from the adjacent face of the fixed table 25.

Each clamp member, or movable jaw, 54 or 55 includes a longitudinally extending brace 85 centrally thereof, the brace being connected to a piston rod 86, of a fluid pressure cylinder 87, the cylinder being fast to a suitable bracket 88 on wheel 23. The clamp moving, or actuation, means 86 and 87 is powered from a suitable pressure source, or mill supply, and controlled by the control system 71 of the invention. Qlt will be understood that the surfaces 56 and 57 of the movable clamps 54 and 55 could be air flotation surfaces if desired, and that the faces 36 and 37 of the table 25 could be formed by the upper and lower stretches of an endless driven conveyor belt if desired.

"in operation, as best shown in FIG. 4, the inverter 20 may be located between a guillotine trimmer 90 and a movable uns 'tacker 91 of a well-known type, the upper face 36 of table 25 being at the level of the air table of the unstacker for loading.

The level ofeach successive lower conveyor face 56 or 57 is at the level of the deck 92 of the trimmer, so that a lift of paper in the lower passage 27 may be discharged by the belt onto the deck. The unstacker 91, in a known manner, penetrates into a 'c'o'unted stack 93, to segregate successive topmost lifts, or reams, such as 94, draw the lift onto the unstacker, move to the inverter 20 and roll convey the lift onto the upper air flotation surface 36 in upper passage 26. The control system 71 then causes the inverter to turn sufficiently to slide the lift sidewise against the vertical flat bars 98 serving as side guides to keep the edges of the sheets aligned, whereupon the clamp 5.4.or 55 closes to hold the lift tightly during the remainder of the l80 turn. Suitable limit switches and photo cells cause the inverter to halt, the clamp 54 to open to the level of the trimmer deck, and the conveyor belt to discharge the lift onto the deck. Meanwhile another lift is being advanced into the :thenuppeipassage, so that the inverter 20 is always handling two lifts in the floor space required by one lift.

Regardless of the number of sheets in each lift, and preferably this will be the maximum number capable of being handled in the trimmer, the count of the stack is not lost, because each lift is being inverted prior to being trimmed for restacking in the exact sheet order of the original untrimmed stack. The final trimmed and reassembled pile, or stack, will be inverted from the original, but the count will have been retained.

glclaim: 1. in an inverter suitable for the sequential inverting of lifts 'ofgpaper andof the type comprising paper-receiving means in a-frame rotatably mounted on a central longitudinal axis for back and forth motion through a 180 angle, the improvement consisting of: v

a dual-faced, back to back centrally located air table fixed in said frame, each'said face being flat, smooth and planar to support a lift and including a plurality of air supply outlets for air cushion support of said lift;

two paper-positioning clamps, each mounted within said frame and each mounted opposite one face of said table,

for clamping movement toward and away from said face,

' said clamps each including a flat, smooth, planar, conveyor belt, lift-clamping surface and powered actuating means for reciprocal moving said lift-clamping conveyor belt surface towards and away from a face of said table thereby forming means to firmly clamp and release a lift of paper therebetween;

t'wo axially extending through passages in said frame, each defined by one said clamping surface of a paper-positioning clamp and the adjacent lift-supporting face of said dual-faced table; and

Fpower means, operably connected to each said conveyor belt surface on said clamps for moving a lift axially through one of said zones.

-2. The inverter of claim 1 wherein each said power driven c'o'n'veying surface consists of series of rolls, an end roll of the series being a crowned drive roll, and an endless belt trained th erearound.

3. The inverter of claim 1 wherein said air table includes gravity actuated valve means for carrying air from an air supply source to the outlets in the face of said air table which is facing upwardly.

4. The inverter of claim 1 plus two-way stabilizer means on each said clamp, said means including gear racks at each end of said clamps on each opposite side thereof, and gears intermeshed therein for preventing lateral, or longitudinal, tilt of said clamps.

5. In an inverter of the type having an elongated frame turnable on a central longitudinal axis through an angular distance of on a base, the'combination of:

an elongated table located centrally in said frame along said axis, said table having a pair of back to back opposite axially extending flat, smooth, planar lift support faces thereon;

a pair of elongated clamps, each having a flat, smooth, planar lift support face extending in parallelism with one of said table faces at a spaced distance therefrom, to form a pair of axially extending through passages in said frame, each on an opposite side of said axis and extending from end to end of said frame, one lift support face in each said passage being mounted for movement toward and away from the other lift support face thereini power means for moving the movable support faces toward and away from the other support faces therein to clamp a lift of flimsy paper sheets therebetween; and at least one said support face in each said passage being formed by an endless belt power conveyor means for moving a lift of paper longitudinally therealong.

6. An inverter as specified in claim 5, wherein:

a said frame includes a single, centrally located, partly circular, wheel turnable in a pair of rolls in the inverter base;

a hollow bearing, at the center of one end of said fixed table journalled on said base, and

said table is an air cushion table supplied with pressurized air through said hollow bearing.

7. An inverter as specified in claim -5, wherein each said lift support face of said table includes air apertures, said table constitutes a plenum connecting said apertures to a source of air pressure and said plenum includes automatic, gravity actuated valve means disconnecting air from the apertures on each successive bottom-most lift support face.

8. An inverter as specified in claim 5, wherein:

said table is an air table connected to a source of air, and

having air outlets in said faces;

each said clamp includes said endless belt power conveyor means forming the lift support surface thereof; and

whereby a lift may be slid into the upper said passage on an air cushion surface of said fixed table, clamped, turned and unclamped by said inverter, and conveyed out of said passage on the conveyor means of the lift support face forming said passage.

9. An inverter as specified in claim 5, wherein:

each opposite end of said movable lift support face is positively connected by intermeshed gear and gear rack stabilizer means to the other end of the movable lift support face of the said clamp on each opposite side thereof; and

whereby both lateral and longitudinal stability of said movable clamps is assured.

10. An inverter for interposition between an unstacker and a paper trimmer deck, for receiving successive lifts of counted sheets, inverting each lift through 180, and is discharging the means mounting belts surfaced clamp jaw for movement toward and away from the fixed jaws;

one said air flotation faced jaw being adapted to slidably receive a lift of counted sheets at one predetermined level while one said belt-surfaced clamp jaw is in position to discharge the previous lift onto said trimmer deck at another, different, predetermined level 11. An inverter for counted, marked lifts of paper sheets,

said inverter comprising:

an elongated inverter frame, rotatably mounted on a base, for turning alongitudinal axis through an' angular distance of at least 180;

an air table fixed centrally and diametrically of said frame, said table having a pair of back to back oppositely disposed, flat, smooth, planar air flotation faces, each on an opposite side of axis;

a pair of movable lift-positioning clamp jaws each mounted on said frame opposite one of said air flotation faces for movement toward and away therefrom and each having a flat, smooth, planar conveyor belt face in general parallelism therewith for mutually defining one of a pair of longitudinally axially extending passages'in said frame;

power means for moving said lift-positioning clamp jaws toward and away from the air flotation faces of said table to clampa lift therebetween for turning; and

power means for turning said frame on said axis to invert each successive lift enclosed in one of said passages and power means for moving said conveyor belt faces to move an unclamped lift axially through said inverter.

12. In an inverter of the type having an elongated frame tumable on a central longitudinal axis through an angular distance of l on a base, the combination of:

an elongated table located in said frame along said axis, said table having a pair of back to back opposite flat, smooth, planar lift support faces thereon;

a pair of elongated clamps, each having ,a flat, smooth,

planar lift support face extending in parallelism with one.

of said table faces at a spaced distancetherefrom, and opposed thereto, to form a pair of axially extending through passages in said frame, each on an opposite side of said axis and extending from end to end of said frame;

at least one lift support face in each said passage being fixed and the other being movable toward and away therefrom;

power means for moving the movable'support face toward and away from the fixed support face, in each said passage, to clamp a lift of flimsy paper sheets therebetween; and t power endless belt conveyor means forming at least one of said opposed flat, smooth, planar support faces in each passage for moving a lift of paper longitudinally therealong.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3770141 *Jan 18, 1971Nov 6, 1973Gen Foods CorpApparatus for inverting stacked units of sheet material
US3805982 *Jan 19, 1971Apr 23, 1974Gen Foods CorpMethod for automatically stacking and inverting stacked units of sheet material
US3895722 *Dec 20, 1973Jul 22, 1975Inland Container CorpBox inverting apparatus
US4165006 *Dec 20, 1977Aug 21, 1979Ugo BrusaApparatus for grouping into bundles elongated objects, more particularly sections or flat rolled elements
US4344727 *Sep 22, 1980Aug 17, 1982St. Regis Paper CompanyMethod and apparatus for stacking and collating articles
US4770566 *Apr 15, 1987Sep 13, 1988Yoshida Kogyo K. K.Slide fastener overturning conveyer
US4838747 *Mar 15, 1988Jun 13, 1989Bobst SaDevice for transporting and forming batches of flat pieces with decreasing thickness
US5085557 *Dec 17, 1990Feb 4, 1992Deere & CompanyLarge part rollover device
US5971695 *Feb 13, 1997Oct 26, 1999Bowe Systec AgTurner with adjustable feed means
US6793454 *Apr 3, 2003Sep 21, 2004Bobst S.A.Device for turning piles of sheet-like material
US7284946Mar 8, 2005Oct 23, 2007O'neil JohnMobile skid turner
US8608423 *Sep 13, 2011Dec 17, 2013Chan Li Machinery Co., Ltd.Device for clamping and rotating the object
US8864435 *May 25, 2012Oct 21, 2014Nitto Denko CorporationTurnover device of liquid crystal panel
US20120163952 *Sep 13, 2011Jun 28, 2012Huang-Pin HsuDevice for clamping and rotating the object
US20120300377 *May 25, 2012Nov 29, 2012Nitto Denko CorporationTurnover device of liquid crystal panel
EP0042198A1 *Jun 12, 1981Dec 23, 1981Ascon Grafische MachinenhandelTurning over machine
Classifications
U.S. Classification414/765, 414/766, 198/403, 414/777
International ClassificationB65H15/02, B65G47/24, B65H15/00
Cooperative ClassificationB65G47/24, B65H15/02, B65H2301/33212
European ClassificationB65G47/24, B65H15/02