US3685253A - Wrapping apparatus - Google Patents

Wrapping apparatus Download PDF

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US3685253A
US3685253A US67032A US3685253DA US3685253A US 3685253 A US3685253 A US 3685253A US 67032 A US67032 A US 67032A US 3685253D A US3685253D A US 3685253DA US 3685253 A US3685253 A US 3685253A
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stack
paper
wrapping
sheet
folding
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US67032A
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Robert E Herrell
Stephen G Moore
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Celotex Corp
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Celotex Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/02Wrapping articles or quantities of material, without changing their position during the wrapping operation, e.g. in moulds with hinged folders

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  • INVENTORS 240 ROBERT E. HERRELL I STEPHEN G. MOORE v v F ATTORNEY.
  • the wrapping apparatus of the present invention finds particular use in the automatic wrapping of panels of insulation board which had been heretofore wrapped by hand or by more complex machinery. While the specific use is described, the apparatus can be used to wrap other units which are in the form of rectangular,
  • the present invention is a wrapping apparatus comprising a partially wrapped package receiving station which has mechanisms operating in a sequential manner to completely wrap the package and discharge the wrapped package.
  • the apparatus is designed to be simple with a few moving parts.
  • the apparatus has provisions for adjustments to accommodate stacks of panels of different heights.
  • the apparatus wraps panels at a rate of three per minute.
  • FIGS. 1 8 are schematic views showing progressive steps of the package as it is formed by the apparatus
  • FIG. 9 is a perspective view of the completely wrapped package
  • FIG. 10 is a perspective view of the wrapping apparatus of the invention with a stack receiving table and a paper holder;
  • FIG. 11 is a top plan view of the wrapping apparatus of FIG. 10 less the stack receiving table and the paper holder;
  • FIG. 12 is a front elevation view of the wrapping apparatus of FIG. 10;
  • FIG. 13 is a right side elevationof the apparatus of FIG. 12;
  • FIG. 14 is a cross-sectional view of a portion of the wrapping apparatus taken along line 14-14 of FIG. 1 1;
  • FIG. 15 is a cross-sectional view of a portion of the apparatus of FIG. 11, similar to FIG. 14 but with a bottom flap being folded up;
  • FIG. 16 is a schematic view of the apparatus with a modified paper feed mechanism.
  • FIGS. 1 8 For convenience in understanding the operation of the apparatus and the steps in which the package is wrapped, reference will be made to FIGS. 1 8 as appropriate.
  • FIG. 10 For a description of the apparatus reference is made to FIG. 10 in which the wrapping apparatus 20, is shown to the right of a paper holder 21 and a stacking table 22.
  • the stacking table 22 comprises an upper open frame 27 with supporting legs 28.
  • a series of idler rolls 30 are mounted in the open frame 27. Rolls 30 are journalled for rotation to receive the stack of panels from a prior forming apparatus (not shown).
  • the actual manufacturing process for the panels is not part of this invention and will not be described in detail except to say that the panels are conventionally formed of mineral fibers with a synthetic therrnosetting binder. Obviously, other types of panels can be wrapped.
  • the panels are in the form of flat sheets, usually about one-half inch thick and about 2 feet by 4 feet in width and length.
  • the stack usually contains about eight panels of about one-half inch in thickness, for a total thickness of 4 inches.
  • the tops of the rolls 30 are coplanar with each other and with a guide plate 31.
  • a stop plate 33 is provided to aid in aligning the panels in a rectangular stack.
  • a push plate 35 is attached to the plunger arm 37 of an air cylinder 39-which in turn is mounted on a support frame 41 secured to frame 27.
  • the various plates, legs and other parts of the stackingtable 22 are connected by bolts or welds in the conventional manner.
  • Air cylinder 39 which may be a double acting cylinder is operated by a conventional source of air, and plunger arm 37 may be retraced in the conventional manner (not shown).
  • stacking table 22 The function of stacking table 22 is to receive the stack of panels, align it and push the stack into the wrapping machine 20.
  • paper holder 21 Interposed between the stacking table 22 and the wrapping machine 20 is a paper holder 21.
  • paper holder 21 comprises a rectangular frame comprising a pair of spaced grilles 44 and 45 with top and bottom split rails 47 and 48, respectively.
  • a series of spaced rods or guide bars 50 extend from top rail 47 to rail 48.
  • a pair of outside upright frame end pieces 51 and 52 extend from top to bottom of frame 40 and hold together grilles 44 and 45 above an opening 53.
  • a similar pair of grilles 54 and 55 form a leading edges and 60a of stack 58.
  • the bight 59 of the paper 57 is centrally located along the leading edges 60 and 60a of the stack 58, and the free ends 62 and 63 of the sheet 57 extend beyond the trailing edges 65 and 65a of stack 58.
  • FIG. 2 shows two positions of sheet 57 as it passes through paper holder 21 into wrapping machine 20.
  • Sheet 57 (in dotted outline) symmetrically folds over stack 58; while in its final position in wrapping machine 20, sheet 57 is shown in solid lines with ends 62 and 63 extending beyond the trailing edges of stack 58.
  • the length and width of sheet 57 are preselected so that ends 62 and 63 each extend outwardly only a distance equal to more than half the height of the stack and less than the full height of the stack.
  • FIGS. 10 13 For perspective and various plan and elevational views of the wrapping apparatus 20. As previously indicated, to keep the description as simple and clear as possible, the
  • Wrapping apparatus 20 comprises a plate or bed on which a series of power driven rollers 82 are journalled for rotation by conventional pillow blocks 85.
  • An electric motor 89 provides power over a chain belt 90 to drive rollers 82 which are connected to each other by a belt and pulley system 91
  • Rollers 82 receive the stack 58, as shown in FIG. 2, with paper 57 partially enfolding it.
  • the leading edge 95 of each roller 82 is bevelled to provide a path for the stack 58 to move over and not be blocked by the edge of rollers 82.
  • Rollers 82 are rotated in unison to push the completely wrapped package out of the wrapping apparatus upon completion of the operation.
  • Rollers 82 form a bed upon which the stack 58 rests as the wrapping function of the apparatus is carried out.
  • a top press plate Spaced from the rollers 82 at a distance about that of the thickness of the stack is a top press plate which pivots about an axis formed by support brackets 102 and a rod 104.
  • Rod 104 is held by mounting brackets 105 which are in turn connected to a carriage 110.
  • Carriage has a pair of wheel assemblies 112 and 113 bolted thereto and arranged to ride in tracks 115 and 116 of main upright support pillars 120 and 121.
  • a height adjusting gear mechanism with an operating crank handle 126' is connected to carriage 110 to provide for an adjustment of the size of the opening between the top of rollers 82 and the press plate 100.
  • An upright support bracket 128 is welded or otherwise secured to carriage 110 about midway between support pillars 120 and 121.
  • press plate 100 To control the pivotal action of press plate 100 is a piston and rod assembly 130 connected at one end to support bracket 128 and at its other end to press plate 100 at a point on top of and near the front edge of press plate 100.
  • the connections are in the form of bifurcated pivotal connectors 131 and 132.
  • a fine leveling adjustment can be made by means of a double threaded coupling 135.
  • press plate 100 can be raised by a pivotal action to make room to receive the stack 58, and then be lowered to keep the top sheet of paper tightly against the upper surface of the stack.
  • folding shoes 140 At the front edge and at the two side edges of press plate 100 are mounted folding shoes 140, 141 and 142 respectively. Each of these folding shoes is controlled by its own piston and rod assembly 145, 146 and 147 respectively. Since the operation of these folding shoes is essentially identical for all shoes, although in a different sequence, the structure and operation of only one will be considered in detail. Reference may be had to FIG. 14 for a detailed description of folding shoe 140.
  • Folding shoe is made in the form of a partial cylinder of a length approximating the width of the press plate 100.
  • fingers 150 which are connected to brackets 151 by rods or bolts 153.
  • Brackets 151 are welded or otherwise affixed to the top of press plate 100. If desired brackets 151 can be bifurcated with fingers 150 inserted between the spaced bifurcation elements.
  • a control rod is pivotally connected to a finger 161 connected on the outside surface of shoe 140 and so spaced from internal finger 150 that movement of the control rod 160 rotates shoe 140 around finger 150 and holds shoe 140 in a series of positions from fully retracted above press plate 100 to a lowered position where the lower edge of shoe 140 can fold the trailing edge of the paper sheet 58 against the trailing edge of stack 58.
  • Control rod 160 is connected to piston and rod assembly 145 at a connecting linkage 172.
  • the controlled movements of piston and rod assemblies in proper sequence will control the folding action of the top flaps of the paper along the top edges of the stack 58.
  • Flap forming shoes 71 and 72 at the front of the apparatus and flap folding shoes and 191 at the rear of the apparatus are connected to the operating pistons 192, 193, 194 and 195 respectively of the cylinders 180 and 181 by means of bolts 200 203 and upstanding channel sections 205 208.
  • a series of rollers 210 212 are operatively connected at the front and two sides respectively of the apparatus by means of power cylinders 215 217, respectively.
  • the cylinders 215 217 are connected to the support frame members of the apparatus by height adjusting brackets 220 222. Adjusting screws 225 227 provide for vertical adjustment of the pistons 215 217.
  • rollers 210 212 are raised by the pistons 230 232 of power cylinders 215 4 217, respectively, to fold up the lower end and edges of the-sheet.
  • Tension springs 235 237 are connected to collars 240 242 at the upper ends of pistons 215 217 to hold rollers 210 212against the stack as they are raised to fold up the paper flaps.
  • Spray nozzles in groups 250 252 are mounted to spray glue or adhesive against the upper surfaces of the lower outward extensions 63 and 300 of paper sheet 57 before they are folded against the outer faces of the upper extensions 62 and 295 of the paper sheet 57 after the latter are folded against the sides of stack 58 by folding shoes 140 142.
  • a suitable supply source of glue is connected to the nozzles and controlled by a timing sequencing unit.
  • FIG. 16 An improved paper feed apparatus is shown in FIG. 16 where a horizontal-shelf 260 supported on posts 261 and 262 holds a stack of sheets 57 of wrapping paper.
  • a chute 265 guides the sheets '57 as they are fed by hand one at a time downwardly into the paper holder 21'.
  • the various functions can be controlled either by a sequential timing mechanism or by limit switches which control an electrically activated'control system.
  • the sequential timing mechanism can be patterned after one which controls the operation of a washing machine in that a constant speed timing control rod is made to rotate upon start of the mechanism.
  • a threaded cam rides along the threaded control rod and closes relay contacts as it proceeds along the rod.
  • the various air sources for the cylinders and the spray nozzles are energized in proper sequence and the electrical motor 89 is also energized in proper sequence.
  • the height of the press plate 100 by means of adjusting mechanism 125, and the rollers 210-212 by means of adjusting units 225-227 is established to accommodate a stack 58 of preselected thickness.
  • the adjustments need not be changed unless a stack 58 of a different thickness is selected.
  • the stack 58 (FIG. 1) is conveyed onto rollers 30 of stacking table 22. Stack 58 is aligned by stop plate 35. Air cylinder 39 is energized either manually or by an automatic switch means and moves forward to push stack 58 into the opening 53 of the paper holder 21. As stack 58 transverses opening 53, it strikes the central area of wrapping sheet 57 which has previously been stretched from the top to the bottom of rectangular frame 40. As stack 58 further progresses through frame 40, it enters into the wrapping apparatus 20.
  • the leading edge of stack 58 is covered by bight 59 of the paper sheet 57, and a first fold 70 is formed by leading shoe 72. Because the paper sheet 57 extends outwardly beyond the sides of stack 58, shoe 72 folds bight 59 against the side of stack 58 and leaves folds 73 and 74 prepared for further operations. Since the wrapping machine is symetrical a similar fold is formed at the other side of the leading edge of the stack (not shown).
  • Press-plate 100 has been raised slightly by means of cylinder 130 so that the stack 58 with its partial wrapping of paper 57 can easily enter the wrapping apparatus 20.
  • the lower surface of portion 63 of sheet 57 rides over the bevelled leading edge 95 of rollers 82.
  • Stack 58 is pushed onto the rollers 82 a distance such that its rear edge is approximately in alignment with the outer edge of press plate 100. Press plate 100 is then lowered to hold the sheet 57 tightly against the upper and lower faces of stack 58.
  • press plate 100 is pivoted about an axis formed by rod 104 along its edge remote from its open edge,
  • Piston and rod assembly is energized to move control rod forward. As can be seen in FIG. 15,
  • control rod 160 causes the edge of folding-shoe 140 to pivot around the axis formed by fingers 151 and rod 153.
  • Leading edge 170 of folding shoe 140 bends end 62 of sheet 57 over upper trailing edge 65 of the stack 58 and forces, it against the trailing portion of the stack 58.
  • Roller 210 is raised by the action of piston 215 and rod 230 to push flap 63 upwardly around lower edge 65a of stack 58 and against the outer face of upper end 62.
  • the film of glue on the upper face of end 63 holds the two ends tightly together.
  • folding shoe 140 and roller 210 cooperate to hold the two ends 62 and 63 of sheet 57 in overlapping relationship against the trailing edge of stack 58 with a layer of glue between the ends.
  • a spring 236 holds roller 210 tightly against the outer surface of end 63.
  • FIG. 4 shows the package as now partially wrapped.
  • the four folding shoes 71, 72, and 191 are then brought into play to fold the outer edges of the sheet 57 into the configuration shown in FIG. 5.
  • piston 181 (at the right of FIG. 11) is operated to move rods 192 and 194 toward each other and consequently move shoes 71 and 190 toward the center of the stack 58.
  • these shoes move from their outermost positions, to areas inwardly of the side edges of stack 58 they form the flaps 73, 74, 290 and 291 shown in FIG. 5.
  • the flap forming shoes 71, 72, 190 and 191 have generally tn'angularly shaped edges with a blunt nose.
  • the height of the shoes is about that of the stack 58 so that as they move toward each other they form the flaps with an intermediate portion 70 of sheet 58 lying flat against stack 58. It will be understood that while only the fold along one side of stack 58 has been shown in detail, the other side of stack 58 has similar folds at its corners.
  • Shoes 71, 72, 190 and 191 are moved outwardly by operation of piston and rod assemblies 180 and 181.
  • Glue or adhesive is sprayed on the upper surface of the lower extending side portion of paper sheet 57 through nozzles 251 spaced along the sides of the apparatus.
  • rollers 211 and 212 are moved upwardly by operation of pistons and rod assemblies 216 and 217, and 231 and 232, respectively. Upward movement of the rollers 211 and 212 causes the outwardly extending side portion 300 of paper sheet 57 to fold upwardly along the lower edge of stack 58 and lie against the outer face of the upper side portion of paper sheet 57 which has previously been folded against stack 58.
  • the adhesive film lies between portions 295 and 300.
  • Stack 58 has now been fully wrapped and the folding shoes and rollers have been retracted and are out of the way.
  • Upper press plate 100 is pivotally raised by means of cylinder 130 to release the pressure on the package.
  • Motor 89 is now energized to drive rollers 82 which eject the package 310 (FIG. 9) from the wrapping apparatus and make it available for further handling, labelling and shipment.
  • the operation of the complete wrapping machine comprises a first stacking portion, a paper holder and a wrapping apparatus which receives a partially enclosed stack of material and completes wrapping without the movement of the stack to different locations.
  • the wrapping apparatus comprises a folding means attached to said receiving and holding means for folding portions of said paper sheet downwardly and partially around the sides of said stack, second folding. means attached to said receiving means for folding the forward and rearward corner edges of said sheet partially around said stack, third folding means attached to said receiving means for folding portions of said paper sheet upwardly against and in overlapping relation with respect to said downwardly folded portions and adhesive application means for applying adhesive to the surface of at least one of said overlapped sheets prior to said overlapping fold.
  • a wrapping machine for wrapping a stack of materials as recited in claim 1 in which said means for partially enfolding the stack in a sheet of paper comprises a stack receiving means and a paper holder, said stack receiving means having a pusher means for pushing said stack through said paper holder and into said stack receiving and holding means.
  • a wrapping machine for wrapping a stack of materials as recited in claim 1, in which said paper holder comprises a vertical frame and spaced guide bars held in said frame for frictionally holding a sheet of paper, said frame being positioned so that the central area of the paper is adapted to be aligned with the central area of said stack.
  • said first folding means comprises elongated partial cylinders in pivotal connection with said holding means along the outer edges of said holding means.
  • said second folding means comprises horizontally reciprocal shoes aligned to move in a plane adjacent the sides of the stack from a position outside the stack to a position alongside the stack.
  • a wrapping machine for wrapping a stack of materials as recited in claim 1 in which said wrapping apparatus further has a bed of rollers for supporting said stack during the wrapping operation and for ejecting said stack from the wrapping apparatus upon completion of the wrapping operation said rollers having bevelled leading ends to guide said partially wrapped stack into said receiving and holding means.
  • a wrapping machine for wrapping a rectangular stack of materials with a paper sheet comprising a stacking table, a paper holder adjacent one side of said stacking table and a wrapping'apparatus located at the side of the paper holder opposite that of said stacking partially wrapped stack holder, folding shoes and rollers which sequentially operate to form the wrapped package and glue applicators to apply a film of adhesive which secures the package in final wrapped form.
  • a wrapping machine for wrapping a stack of materials having a preselected length and width comprising a first means for partially enfolding the stack in a sheet of paper, means for receiving said stack with said sheet being folded only against the leading edge and the top and bottom sides of said stack and for holding said stack in a fixed position during the remainder of the wrapping cycle; said receiving and holding means being of substantially the same length and width as said preselected length and width of said stack, first table, said stacking table having a device mounted thereon for pushing said stack through said paper holder to partially envelope said stack in said paper sheet and further into said wrapping apparatus, said wrapping apparatus comprising a frame, a top press plate pivotally mounted on said frame to hold said partially enveloped stack, means mounted on said plate for folding upper portions of said paper sheet downwardly against sides of said stack, flap folding means being mounted on said frame for horizontal movement and adapted to form flaps of said paper sheet at each corner of said stack, means mounted on said frame below said stack and being upwardly moveable for folding lower portions of said sheet in overlapping relation with respect to said upper
  • a wrapping machine comprising a stack receiving means, a paper holding means adjacent said stack receiving means and a wrapping apparatus in alignment with said paper holding means and located on the side of said paper holding means oppositesaid stack receiving means,
  • said stack receiving means comprising a frame, roll journalled within said frame and being coplanar to receive a stack of materials, pusher means mounted along one edge of said frame for pushing said stack off said roll in the direction of said paper holding means and said wrapping means,
  • said paper holding means comprising a vertical frame with spaced guide bars adapted to hold a sheet of paper with the center of the sheet being aligned with the center of the stack, said paper holding means having an opening aligned with said coplanar rollers through which said stack is pushed,
  • said wrapping apparatus having a stack supporting means and a pivotally supported top press plate for holding said stack immobile during the remainder of the wrapping operation
  • said wrapping apparatus further having pivotally operated folding shoes for folding portions of the sheet of paper around the upper portions of said stack, horizontally moveable folding shoes for folding the comer edges of said paper around said stack and vertically operated rollers mounted below the level of said horizontally moveable folding shoes to fold bottom portions of said sheet in overlapping relation with respect to said upper folded portions of said sheet of paper, and adhesive application means located peripherally of said wrapping means for applying adhesive to selected areas of said paper before said overlapping folding operation.
  • a wrapping apparatus for wrapping a rectangular stack of material which stack of material is partially envelop'ed by sheet of paper, which sheet is in. contact with and covers the top and bottom surfaces and one end of the stack with the sides and free ends of the paper extending outwardly from the open end and sides of the stack respectively, comprising a series of coplanar rollers adapted to receive said partially wrapped stack, a top press plate pivotally supported a pre-selected distance above said base portion, means pivotally mounted along a top edge of said platform for folding a top trailing edge of said sheet over an area of more than one-half of the area of said open end, applicator means mounted so as to apply a film of adhesive on the upper face of the lower trailing edge of said paper, means for moving said lower trailing edge of said sheet into overlapping engagement with said top trailing edge of said sheet, shoe means mounted for horizontal movement to form flaps of said paper at the vertical corners of said stack, further means pivotally mounted on said plate and adapted to fold upper side extensions of said paper sheet against sides of said stack, upward

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Packaging Of Special Articles (AREA)

Abstract

An apparatus for automatically wrapping a multi-layer stack of panels within a sheet of paper without moving the stack of panels during the major part of the wrapping operation. The apparatus has sequentially operated mechanisms to fold, glue and hold the paper during the operation.

Description

United States Patent Herrellet al.
[151, 3,685,253 51 Aug. 22, 1972 [54] WRAPPING APPARATUS [72] Inventors: Robert E. Herrell, Wabash, Ind;
Stephen G. Moore, Tampa, Fla.
[73] Assignee: The Celotex Corporation, Tampa,
Fla.
22 Filed: Aug.26, 1970 [21] Appl.No.: 67,032
[51] Int. Cl .Q..B65b ll/0 2, B6 5b 11/12 [58] Field of Search ..53/209, 218, 222, 228, 230
[56] References Cited UNITED STATES PATENTS 2,917,887 12/1959 Jackson ..53/230 3,327,452 6/ 1967 Cranston, Jr. et al. ..53/218 3,307,326 3/1967 Krebs ..53/228'X 3,110,143 ll/l963 Schooler ..53/230 X 3,338,025 8/1967 Harrison et a1. ..53/230 Primary ExaminerTheron E. Condon Assistant Examiner-Neil Abrams Attorney-James W. Grace [57] I ABSTRACT An apparatus for automatically wrapping a multi-layer stack of panels within a sheet of paper without moving the stack of panels during the major part of the wrapping operation. The apparatus has sequentially operated mechanisms to fold, glue and hold the paper during the operation.
10 Claims, 16 Drawing Figures PATENTED 3 685, 253
sum 2 OF 6 PAIENTEDwnzzmz v 3.685.253 sum 3 or 6 INVENTORS F|G.| 4 ROBERT E. HERRELL BY STEPHEN G.MOORE (WA {k1 i ATTORNEY.
PATENTED S 3.685.253 saw u or 6 FIG.|2
v INVENTORS ROBERT E. HERRELL Y STEPHENG. MOORE ATTORNEY.
P'ATENTED M1922 I972 FIG.I 3
SHEET 5 BF 6 INVENTORS ROBERT E. HERRELL BY STEPHEN GMOORE ATTORNEY.
rmmcnmzz m2 3.685253 saw s are FIG. l6
. FIG. [5
INVENTORS 240 ROBERT E. HERRELL I STEPHEN G. MOORE v v F ATTORNEY.
BY' 2l5 WRAPPING APPARATUS BACKGROUND OF THE INVENTION 1. Field of the Invention The wrapping apparatus of the present invention finds particular use in the automatic wrapping of panels of insulation board which had been heretofore wrapped by hand or by more complex machinery. While the specific use is described, the apparatus can be used to wrap other units which are in the form of rectangular,
four-sided stacks.
2. Description of the Prior Art The prior art consists mainly of either manual wrapping of stacks of panels or long multi-stage wrapping machines. Hand wrapping by a crew of men is a slow, costly and inefficient operation. The finished package is not usually as tight and neat as desired.
In the wrapping of stacks of panels by machine, the prior art comprises machines with multiple stages,-at each of which a folding or gluing operation takes place. The stack of panels progresses by conveyor mechanism from one stage to another as each separate folding and gluing operation is performed. Such machinery is very costly and occupies a large amount of valuable floor area in a plant. Furthermore, such machinery usually has a large number of moving parts, thus presenting maintenance and repair problems.
SUMMARY OF THE INVENTION The present invention is a wrapping apparatus comprising a partially wrapped package receiving station which has mechanisms operating in a sequential manner to completely wrap the package and discharge the wrapped package. The apparatus is designed to be simple with a few moving parts. In addition, the apparatus has provisions for adjustments to accommodate stacks of panels of different heights. The apparatus wraps panels at a rate of three per minute.
It is an object of the present invention .to provide a novel wrapping apparatus which completely wraps a package without multiple operating stations.
It is another object of the present invention to provide a novel wrapping apparatus which operates sequentially to form a tight, neat package.
It is yet another object of the present invention to provide a novel wrapping apparatus which can wrap packages in a fast, efficient manner.
It is a further object of the present invention to provide a novel wrapping apparatus which occupies a minimum amount of floor area.
Other objects and advantages of the present invention will occur to those skilled in the art when the following description is considered in conjunction with the attached drawings, in which like numbers indicate like elements and in which:
FIGS. 1 8 are schematic views showing progressive steps of the package as it is formed by the apparatus;
FIG. 9 is a perspective view of the completely wrapped package;
FIG. 10 is a perspective view of the wrapping apparatus of the invention with a stack receiving table and a paper holder;
FIG. 11 is a top plan view of the wrapping apparatus of FIG. 10 less the stack receiving table and the paper holder;
FIG. 12 is a front elevation view of the wrapping apparatus of FIG. 10;
FIG. 13 is a right side elevationof the apparatus of FIG. 12;
FIG. 14 is a cross-sectional view of a portion of the wrapping apparatus taken along line 14-14 of FIG. 1 1;
FIG. 15 is a cross-sectional view of a portion of the apparatus of FIG. 11, similar to FIG. 14 but with a bottom flap being folded up; and
FIG. 16 is a schematic view of the apparatus with a modified paper feed mechanism.
For convenience in understanding the operation of the apparatus and the steps in which the package is wrapped, reference will be made to FIGS. 1 8 as appropriate.
For a description of the apparatus reference is made to FIG. 10 in which the wrapping apparatus 20, is shown to the right of a paper holder 21 and a stacking table 22.
The stacking table 22 comprises an upper open frame 27 with supporting legs 28. A series of idler rolls 30 are mounted in the open frame 27. Rolls 30 are journalled for rotation to receive the stack of panels from a prior forming apparatus (not shown). The actual manufacturing process for the panels is not part of this invention and will not be described in detail except to say that the panels are conventionally formed of mineral fibers with a synthetic therrnosetting binder. Obviously, other types of panels can be wrapped. The panels are in the form of flat sheets, usually about one-half inch thick and about 2 feet by 4 feet in width and length. The stack usually contains about eight panels of about one-half inch in thickness, for a total thickness of 4 inches.
The tops of the rolls 30 are coplanar with each other and with a guide plate 31. A stop plate 33 is provided to aid in aligning the panels in a rectangular stack. A push plate 35 is attached to the plunger arm 37 of an air cylinder 39-which in turn is mounted on a support frame 41 secured to frame 27. The various plates, legs and other parts of the stackingtable 22 are connected by bolts or welds in the conventional manner. Air cylinder 39 which may be a double acting cylinder is operated by a conventional source of air, and plunger arm 37 may be retraced in the conventional manner (not shown).
The function of stacking table 22 is to receive the stack of panels, align it and push the stack into the wrapping machine 20.
Interposed between the stacking table 22 and the wrapping machine 20 is a paper holder 21. In its simplest form paper holder 21 comprises a rectangular frame comprising a pair of spaced grilles 44 and 45 with top and bottom split rails 47 and 48, respectively. A series of spaced rods or guide bars 50 extend from top rail 47 to rail 48. A pair of outside upright frame end pieces 51 and 52 extend from top to bottom of frame 40 and hold together grilles 44 and 45 above an opening 53. A similar pair of grilles 54 and 55 form a leading edges and 60a of stack 58. The bight 59 of the paper 57 is centrally located along the leading edges 60 and 60a of the stack 58, and the free ends 62 and 63 of the sheet 57 extend beyond the trailing edges 65 and 65a of stack 58.
FIG. 2 shows two positions of sheet 57 as it passes through paper holder 21 into wrapping machine 20. Sheet 57 (in dotted outline) symmetrically folds over stack 58; while in its final position in wrapping machine 20, sheet 57 is shown in solid lines with ends 62 and 63 extending beyond the trailing edges of stack 58. The length and width of sheet 57 are preselected so that ends 62 and 63 each extend outwardly only a distance equal to more than half the height of the stack and less than the full height of the stack.
As will become apparent later portions of the central area of sheet 57 are tucked in against the sides of stack 58 at its leading edges 60 and 60a by folding shoes 71 and 72 (shown in FIG. 10). Flaps 73 and 74 are formed by this folding operation.
Reference may now be made to FIGS. 10 13 for perspective and various plan and elevational views of the wrapping apparatus 20. As previously indicated, to keep the description as simple and clear as possible, the
framework and other purely structural details will not.
be referred to in detail.
Wrapping apparatus 20 comprises a plate or bed on which a series of power driven rollers 82 are journalled for rotation by conventional pillow blocks 85. An electric motor 89 provides power over a chain belt 90 to drive rollers 82 which are connected to each other by a belt and pulley system 91 Rollers 82 receive the stack 58, as shown in FIG. 2, with paper 57 partially enfolding it. The leading edge 95 of each roller 82 is bevelled to provide a path for the stack 58 to move over and not be blocked by the edge of rollers 82. Rollers 82 are rotated in unison to push the completely wrapped package out of the wrapping apparatus upon completion of the operation. Rollers 82 form a bed upon which the stack 58 rests as the wrapping function of the apparatus is carried out.
Spaced from the rollers 82 at a distance about that of the thickness of the stack is a top press plate which pivots about an axis formed by support brackets 102 and a rod 104. Rod 104 is held by mounting brackets 105 which are in turn connected to a carriage 110. Carriage has a pair of wheel assemblies 112 and 113 bolted thereto and arranged to ride in tracks 115 and 116 of main upright support pillars 120 and 121. A height adjusting gear mechanism with an operating crank handle 126' is connected to carriage 110 to provide for an adjustment of the size of the opening between the top of rollers 82 and the press plate 100.- Thus stacks of varying thickness can be accommodated.
An upright support bracket 128 is welded or otherwise secured to carriage 110 about midway between support pillars 120 and 121.
To control the pivotal action of press plate 100 is a piston and rod assembly 130 connected at one end to support bracket 128 and at its other end to press plate 100 at a point on top of and near the front edge of press plate 100. The connections are in the form of bifurcated pivotal connectors 131 and 132. A fine leveling adjustment can be made by means of a double threaded coupling 135.
By means of piston and rod assembly 130, press plate 100 can be raised by a pivotal action to make room to receive the stack 58, and then be lowered to keep the top sheet of paper tightly against the upper surface of the stack.
At the front edge and at the two side edges of press plate 100 are mounted folding shoes 140, 141 and 142 respectively. Each of these folding shoes is controlled by its own piston and rod assembly 145, 146 and 147 respectively. Since the operation of these folding shoes is essentially identical for all shoes, although in a different sequence, the structure and operation of only one will be considered in detail. Reference may be had to FIG. 14 for a detailed description of folding shoe 140.
Folding shoe is made in the form of a partial cylinder of a length approximating the width of the press plate 100. Along spaced intervals inside the curved surface and near one edge of shoe 140 are fingers 150 which are connected to brackets 151 by rods or bolts 153. Brackets 151 are welded or otherwise affixed to the top of press plate 100. If desired brackets 151 can be bifurcated with fingers 150 inserted between the spaced bifurcation elements. A control rod is pivotally connected to a finger 161 connected on the outside surface of shoe 140 and so spaced from internal finger 150 that movement of the control rod 160 rotates shoe 140 around finger 150 and holds shoe 140 in a series of positions from fully retracted above press plate 100 to a lowered position where the lower edge of shoe 140 can fold the trailing edge of the paper sheet 58 against the trailing edge of stack 58. Control rod 160 is connected to piston and rod assembly 145 at a connecting linkage 172.
As can be easily appreciated, the controlled movements of piston and rod assemblies in proper sequence will control the folding action of the top flaps of the paper along the top edges of the stack 58. Along the edges of the wrapping apparatus is a pair of double acting cylinders and 181. Flap forming shoes 71 and 72 at the front of the apparatus and flap folding shoes and 191 at the rear of the apparatus are connected to the operating pistons 192, 193, 194 and 195 respectively of the cylinders 180 and 181 by means of bolts 200 203 and upstanding channel sections 205 208.
As cylinder 180 operates, its respective piston rods 193 and 195 move outwardly or are retracted and the flap forming shoes 72 and 191 are correspondingly moved away from or toward cylinder 180 as controlled. A similar action occurs with flap forming shoes 71 and 190 along the other edge of the apparatus.
To fold the lower ends and edges of the paper over the upper flap, a series of rollers 210 212 are operatively connected at the front and two sides respectively of the apparatus by means of power cylinders 215 217, respectively. The cylinders 215 217 are connected to the support frame members of the apparatus by height adjusting brackets 220 222. Adjusting screws 225 227 provide for vertical adjustment of the pistons 215 217.
In proper operating sequence the rollers 210 212 are raised by the pistons 230 232 of power cylinders 215 4 217, respectively, to fold up the lower end and edges of the-sheet. Tension springs 235 237 are connected to collars 240 242 at the upper ends of pistons 215 217 to hold rollers 210 212against the stack as they are raised to fold up the paper flaps.
Spray nozzles in groups 250 252 are mounted to spray glue or adhesive against the upper surfaces of the lower outward extensions 63 and 300 of paper sheet 57 before they are folded against the outer faces of the upper extensions 62 and 295 of the paper sheet 57 after the latter are folded against the sides of stack 58 by folding shoes 140 142. A suitable supply source of glue is connected to the nozzles and controlled by a timing sequencing unit.
An improved paper feed apparatus is shown in FIG. 16 where a horizontal-shelf 260 supported on posts 261 and 262 holds a stack of sheets 57 of wrapping paper. A chute 265 guides the sheets '57 as they are fed by hand one at a time downwardly into the paper holder 21'.
After the description of the various individual components of the apparatus of the invention, the opera-' tional sequence will now be described. The various functions can be controlled either by a sequential timing mechanism or by limit switches which control an electrically activated'control system. The sequential timing mechanism can be patterned after one which controls the operation of a washing machine in that a constant speed timing control rod is made to rotate upon start of the mechanism. A threaded cam rides along the threaded control rod and closes relay contacts as it proceeds along the rod. The various air sources for the cylinders and the spray nozzles are energized in proper sequence and the electrical motor 89 is also energized in proper sequence.
The use of limit switches and their placement will will be clear to one skilled in the art.
To simplify the drawings and the explanation, the specific electrical and air control devices are neither shown now described in detail.
Before operating the wrapping apparatus, the height of the press plate 100 by means of adjusting mechanism 125, and the rollers 210-212 by means of adjusting units 225-227 is established to accommodate a stack 58 of preselected thickness. The adjustments need not be changed unless a stack 58 of a different thickness is selected.
The stack 58 (FIG. 1) is conveyed onto rollers 30 of stacking table 22. Stack 58 is aligned by stop plate 35. Air cylinder 39 is energized either manually or by an automatic switch means and moves forward to push stack 58 into the opening 53 of the paper holder 21. As stack 58 transverses opening 53, it strikes the central area of wrapping sheet 57 which has previously been stretched from the top to the bottom of rectangular frame 40. As stack 58 further progresses through frame 40, it enters into the wrapping apparatus 20.
At this time, the leading edge of stack 58 is covered by bight 59 of the paper sheet 57, and a first fold 70 is formed by leading shoe 72. Because the paper sheet 57 extends outwardly beyond the sides of stack 58, shoe 72 folds bight 59 against the side of stack 58 and leaves folds 73 and 74 prepared for further operations. Since the wrapping machine is symetrical a similar fold is formed at the other side of the leading edge of the stack (not shown).
Press-plate 100 has been raised slightly by means of cylinder 130 so that the stack 58 with its partial wrapping of paper 57 can easily enter the wrapping apparatus 20. The lower surface of portion 63 of sheet 57 rides over the bevelled leading edge 95 of rollers 82.
Stack 58 is pushed onto the rollers 82 a distance such that its rear edge is approximately in alignment with the outer edge of press plate 100. Press plate 100 is then lowered to hold the sheet 57 tightly against the upper and lower faces of stack 58.
Since press plate 100 is pivoted about an axis formed by rod 104 along its edge remote from its open edge,
- there is a slight incline from open edge to rear edge and leading edge and sides of stack 58, partially enveloping the stack. The major flat portions of sheet 57 lies against the large flat top and bottom areas of stack 57 with the trailing ends 62 and 63 extending freely beyond the rear edge 65 of stack 58.
Piston and rod assembly is energized to move control rod forward. As can be seen in FIG. 15,
forward movement of control rod 160 causes the edge of folding-shoe 140 to pivot around the axis formed by fingers 151 and rod 153. Leading edge 170 of folding shoe 140 bends end 62 of sheet 57 over upper trailing edge 65 of the stack 58 and forces, it against the trailing portion of the stack 58.
While the trailing end 62 of sheet 57 is held in place against the rear edge of stack 58, glue or other adhesive is squirted through nozzles 250 against the upper face of lower end 63 which extends outwardly beyond the lower edge 65 of stack 58. A thin coating of glue is applied over this upper surface in this manner.
Roller 210 is raised by the action of piston 215 and rod 230 to push flap 63 upwardly around lower edge 65a of stack 58 and against the outer face of upper end 62. The film of glue on the upper face of end 63 holds the two ends tightly together. At the time folding shoe 140 and roller 210 cooperate to hold the two ends 62 and 63 of sheet 57 in overlapping relationship against the trailing edge of stack 58 with a layer of glue between the ends. A spring 236 holds roller 210 tightly against the outer surface of end 63. FIG. 4 shows the package as now partially wrapped.
The four folding shoes 71, 72, and 191 are then brought into play to fold the outer edges of the sheet 57 into the configuration shown in FIG. 5. Thus, piston 181 (at the right of FIG. 11) is operated to move rods 192 and 194 toward each other and consequently move shoes 71 and 190 toward the center of the stack 58. As these shoes move from their outermost positions, to areas inwardly of the side edges of stack 58 they form the flaps 73, 74, 290 and 291 shown in FIG. 5. As more clearly shown in FIGS. 10 and 14, the flap forming shoes 71, 72, 190 and 191 have generally tn'angularly shaped edges with a blunt nose. The height of the shoes is about that of the stack 58 so that as they move toward each other they form the flaps with an intermediate portion 70 of sheet 58 lying flat against stack 58. It will be understood that while only the fold along one side of stack 58 has been shown in detail, the other side of stack 58 has similar folds at its corners.
With the corners of stack 58 now covered by the action of the folding shoes 71, 72, 190 and 191, the upper outwardly extending side ends 295 are folded downwardly over the upper side edge of stack 58 by non! side folding shoes 141 and 142. In the manner described in detail with respect to the front folding shoe 140, side folding shoes are so operated their respective operating piston and rod assemblies 146 and 147, respectively, push their control rods outwardly to pivot shoes 141 and 142 around their respective axes and thus fold edges 295 and upper flaps 73 and 290 over the upper portions of the sides of stack 58.
Shoes 71, 72, 190 and 191 are moved outwardly by operation of piston and rod assemblies 180 and 181.
Glue or adhesive is sprayed on the upper surface of the lower extending side portion of paper sheet 57 through nozzles 251 spaced along the sides of the apparatus. After the application of the glue, rollers 211 and 212 are moved upwardly by operation of pistons and rod assemblies 216 and 217, and 231 and 232, respectively. Upward movement of the rollers 211 and 212 causes the outwardly extending side portion 300 of paper sheet 57 to fold upwardly along the lower edge of stack 58 and lie against the outer face of the upper side portion of paper sheet 57 which has previously been folded against stack 58. The adhesive film lies between portions 295 and 300.
After allowing a few seconds for the glue to set, all of the pistons controlling the folding shoes 140, 141 and 142; namely, pistons 145, 146 and !47, and the pistons controlling the rollers 210, 211 and 212; namely, pistons 215, 216 and 217 are retracted to return the folding shoes and the rollers to their initial positions.
Stack 58 has now been fully wrapped and the folding shoes and rollers have been retracted and are out of the way. Upper press plate 100 is pivotally raised by means of cylinder 130 to release the pressure on the package. Motor 89 is now energized to drive rollers 82 which eject the package 310 (FIG. 9) from the wrapping apparatus and make it available for further handling, labelling and shipment. v
During the operation of the wrapping machine 20, cylinder 39 has been restored to its retracted position to move pusher plate 35 to its outward position. Also during the wrapping operation, the operator has'placed a new sheet of paper in paper holder 21. Thus, the entire mechanism is ready for another stack to be wrapped.
In summary, the operation of the complete wrapping machine comprises a first stacking portion, a paper holder and a wrapping apparatus which receives a partially enclosed stack of material and completes wrapping without the movement of the stack to different locations. The wrapping apparatus comprises a folding means attached to said receiving and holding means for folding portions of said paper sheet downwardly and partially around the sides of said stack, second folding. means attached to said receiving means for folding the forward and rearward corner edges of said sheet partially around said stack, third folding means attached to said receiving means for folding portions of said paper sheet upwardly against and in overlapping relation with respect to said downwardly folded portions and adhesive application means for applying adhesive to the surface of at least one of said overlapped sheets prior to said overlapping fold.
2. A wrapping machine for wrapping a stack of materials as recited in claim 1 in which said means for partially enfolding the stack in a sheet of paper comprises a stack receiving means and a paper holder, said stack receiving means having a pusher means for pushing said stack through said paper holder and into said stack receiving and holding means.
3. A wrapping machine for wrapping a stack of materials, as recited in claim 1, in which said paper holder comprises a vertical frame and spaced guide bars held in said frame for frictionally holding a sheet of paper, said frame being positioned so that the central area of the paper is adapted to be aligned with the central area of said stack.
4. A wrapping machine as recited in claim 1, in which said first folding means comprises elongated partial cylinders in pivotal connection with said holding means along the outer edges of said holding means.
5. A wrapping machine as recited in claim 1, in which said second folding means comprises horizontally reciprocal shoes aligned to move in a plane adjacent the sides of the stack from a position outside the stack to a position alongside the stack.
6. A wrapping machine for wrapping a stack of materials as recited in claim 1 in which said wrapping apparatus further has a bed of rollers for supporting said stack during the wrapping operation and for ejecting said stack from the wrapping apparatus upon completion of the wrapping operation said rollers having bevelled leading ends to guide said partially wrapped stack into said receiving and holding means.
7. A wrapping machine for wrapping a rectangular stack of materials with a paper sheet comprising a stacking table, a paper holder adjacent one side of said stacking table and a wrapping'apparatus located at the side of the paper holder opposite that of said stacking partially wrapped stack holder, folding shoes and rollers which sequentially operate to form the wrapped package and glue applicators to apply a film of adhesive which secures the package in final wrapped form.
We claim:
1. A wrapping machine for wrapping a stack of materials having a preselected length and width comprising a first means for partially enfolding the stack in a sheet of paper, means for receiving said stack with said sheet being folded only against the leading edge and the top and bottom sides of said stack and for holding said stack in a fixed position during the remainder of the wrapping cycle; said receiving and holding means being of substantially the same length and width as said preselected length and width of said stack, first table, said stacking table having a device mounted thereon for pushing said stack through said paper holder to partially envelope said stack in said paper sheet and further into said wrapping apparatus, said wrapping apparatus comprising a frame, a top press plate pivotally mounted on said frame to hold said partially enveloped stack, means mounted on said plate for folding upper portions of said paper sheet downwardly against sides of said stack, flap folding means being mounted on said frame for horizontal movement and adapted to form flaps of said paper sheet at each corner of said stack, means mounted on said frame below said stack and being upwardly moveable for folding lower portions of said sheet in overlapping relation with respect to said upper portions of said sheet and adhesive application means to apply a film of adhesive to the surfaces of at least one of said overlapped sheets prior to said overlapping fold.
8. A wrapping machine comprising a stack receiving means, a paper holding means adjacent said stack receiving means and a wrapping apparatus in alignment with said paper holding means and located on the side of said paper holding means oppositesaid stack receiving means,
said stack receiving means comprising a frame, roll journalled within said frame and being coplanar to receive a stack of materials, pusher means mounted along one edge of said frame for pushing said stack off said roll in the direction of said paper holding means and said wrapping means,
said paper holding means comprising a vertical frame with spaced guide bars adapted to hold a sheet of paper with the center of the sheet being aligned with the center of the stack, said paper holding means having an opening aligned with said coplanar rollers through which said stack is pushed,
said wrapping apparatus having a stack supporting means and a pivotally supported top press plate for holding said stack immobile during the remainder of the wrapping operation,
said wrapping apparatus further having pivotally operated folding shoes for folding portions of the sheet of paper around the upper portions of said stack, horizontally moveable folding shoes for folding the comer edges of said paper around said stack and vertically operated rollers mounted below the level of said horizontally moveable folding shoes to fold bottom portions of said sheet in overlapping relation with respect to said upper folded portions of said sheet of paper, and adhesive application means located peripherally of said wrapping means for applying adhesive to selected areas of said paper before said overlapping folding operation.
9. A wrapping apparatus for wrapping a rectangular stack of material which stack of material is partially envelop'ed by sheet of paper, which sheet is in. contact with and covers the top and bottom surfaces and one end of the stack with the sides and free ends of the paper extending outwardly from the open end and sides of the stack respectively, comprising a series of coplanar rollers adapted to receive said partially wrapped stack, a top press plate pivotally supported a pre-selected distance above said base portion, means pivotally mounted along a top edge of said platform for folding a top trailing edge of said sheet over an area of more than one-half of the area of said open end, applicator means mounted so as to apply a film of adhesive on the upper face of the lower trailing edge of said paper, means for moving said lower trailing edge of said sheet into overlapping engagement with said top trailing edge of said sheet, shoe means mounted for horizontal movement to form flaps of said paper at the vertical corners of said stack, further means pivotally mounted on said plate and adapted to fold upper side extensions of said paper sheet against sides of said stack, upwardly acting means adapted to fold the lower side extension of said upwardly in overlapping relationship with respect to said downwardly folded upper side extensi us of s 'd a er sh et d adhesive a lic tion means or appl yinga iilm 0 ad esive to surfa s of said lower extensions.
10. A wrapping machine for wrapping a rectangular stack of materials as recited in claim 7, in which said top press plate is mounted on a track and adapted for vertical adjustment to accommodate stacks of different thicknesses.

Claims (10)

1. A wrapping machine for wrapping a stack of materials having a preselected length and width comprising a first means for partially enfolding the stack in a sheet of paper, means for receiving said stack with saId sheet being folded only against the leading edge and the top and bottom sides of said stack and for holding said stack in a fixed position during the remainder of the wrapping cycle; said receiving and holding means being of substantially the same length and width as said preselected length and width of said stack, first folding means attached to said receiving and holding means for folding portions of said paper sheet downwardly and partially around the sides of said stack, second folding means attached to said receiving means for folding the forward and rearward corner edges of said sheet partially around said stack, third folding means attached to said receiving means for folding portions of said paper sheet upwardly against and in overlapping relation with respect to said downwardly folded portions and adhesive application means for applying adhesive to the surface of at least one of said overlapped sheets prior to said overlapping fold.
2. A wrapping machine for wrapping a stack of materials as recited in claim 1 in which said means for partially enfolding the stack in a sheet of paper comprises a stack receiving means and a paper holder, said stack receiving means having a pusher means for pushing said stack through said paper holder and into said stack receiving and holding means.
3. A wrapping machine for wrapping a stack of materials, as recited in claim 1, in which said paper holder comprises a vertical frame and spaced guide bars held in said frame for frictionally holding a sheet of paper, said frame being positioned so that the central area of the paper is adapted to be aligned with the central area of said stack.
4. A wrapping machine as recited in claim 1, in which said first folding means comprises elongated partial cylinders in pivotal connection with said holding means along the outer edges of said holding means.
5. A wrapping machine as recited in claim 1, in which said second folding means comprises horizontally reciprocal shoes aligned to move in a plane adjacent the sides of the stack from a position outside the stack to a position alongside the stack.
6. A wrapping machine for wrapping a stack of materials as recited in claim 1 in which said wrapping apparatus further has a bed of rollers for supporting said stack during the wrapping operation and for ejecting said stack from the wrapping apparatus upon completion of the wrapping operation said rollers having bevelled leading ends to guide said partially wrapped stack into said receiving and holding means.
7. A wrapping machine for wrapping a rectangular stack of materials with a paper sheet comprising a stacking table, a paper holder adjacent one side of said stacking table and a wrapping apparatus located at the side of the paper holder opposite that of said stacking table, said stacking table having a device mounted thereon for pushing said stack through said paper holder to partially envelope said stack in said paper sheet and further into said wrapping apparatus, said wrapping apparatus comprising a frame, a top press plate pivotally mounted on said frame to hold said partially enveloped stack, means mounted on said plate for folding upper portions of said paper sheet downwardly against sides of said stack, flap folding means being mounted on said frame for horizontal movement and adapted to form flaps of said paper sheet at each corner of said stack, means mounted on said frame below said stack and being upwardly moveable for folding lower portions of said sheet in overlapping relation with respect to said upper portions of said sheet and adhesive application means to apply a film of adhesive to the surfaces of at least one of said overlapped sheets prior to said overlapping fold.
8. A wrapping machine comprising a stack receiving means, a paper holding means adjacent said stack receiving means and a wrapping apparatus in alignment with said paper holding means and located on the side of said paper holding means opposite said stack receiving means, said stack receiving means comprising a frame, roll journalled within said frame and being coplanar to receive a stack of materials, pusher means mounted along one edge of said frame for pushing said stack off said roll in the direction of said paper holding means and said wrapping means, said paper holding means comprising a vertical frame with spaced guide bars adapted to hold a sheet of paper with the center of the sheet being aligned with the center of the stack, said paper holding means having an opening aligned with said coplanar rollers through which said stack is pushed, said wrapping apparatus having a stack supporting means and a pivotally supported top press plate for holding said stack immobile during the remainder of the wrapping operation, said wrapping apparatus further having pivotally operated folding shoes for folding portions of the sheet of paper around the upper portions of said stack, horizontally moveable folding shoes for folding the corner edges of said paper around said stack and vertically operated rollers mounted below the level of said horizontally moveable folding shoes to fold bottom portions of said sheet in overlapping relation with respect to said upper folded portions of said sheet of paper, and adhesive application means located peripherally of said wrapping means for applying adhesive to selected areas of said paper before said overlapping folding operation.
9. A wrapping apparatus for wrapping a rectangular stack of material which stack of material is partially enveloped by sheet of paper, which sheet is in contact with and covers the top and bottom surfaces and one end of the stack with the sides and free ends of the paper extending outwardly from the open end and sides of the stack respectively, comprising a series of coplanar rollers adapted to receive said partially wrapped stack, a top press plate pivotally supported a pre-selected distance above said base portion, means pivotally mounted along a top edge of said platform for folding a top trailing edge of said sheet over an area of more than one-half of the area of said open end, applicator means mounted so as to apply a film of adhesive on the upper face of the lower trailing edge of said paper, means for moving said lower trailing edge of said sheet into overlapping engagement with said top trailing edge of said sheet, shoe means mounted for horizontal movement to form flaps of said paper at the vertical corners of said stack, further means pivotally mounted on said plate and adapted to fold upper side extensions of said paper sheet against sides of said stack, upwardly acting means adapted to fold the lower side extension of said upwardly in overlapping relationship with respect to said downwardly folded upper side extensions of said paper sheet and adhesive application means for applying a film of adhesive to surfaces of said lower extensions.
10. A wrapping machine for wrapping a rectangular stack of materials as recited in claim 7, in which said top press plate is mounted on a track and adapted for vertical adjustment to accommodate stacks of different thicknesses.
US67032A 1970-08-26 1970-08-26 Wrapping apparatus Expired - Lifetime US3685253A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091596A (en) * 1976-05-25 1978-05-30 Enmail Machine Corporation Method of and apparatus for manufacturing envelopes
US4343129A (en) * 1976-04-27 1982-08-10 G.B.R., Ltd. Mechanism of making an envelope
US4400929A (en) * 1980-03-03 1983-08-30 Yuwa Sangyo Kabushiki Kaisha Apparatus for forming box-shaped covering body
US5402620A (en) * 1991-07-05 1995-04-04 O.M.G. Di Giorgio Pessina E Aldo Perobelli S.N.C. Device and method for closing and laterally sealing plastic film wrapped bundles containing sheets or the like
US5404694A (en) * 1992-03-03 1995-04-11 G.D Societa' Per Azioni Method of producing cartons of cigarettes
US6612100B1 (en) * 1999-08-23 2003-09-02 Fuji Photo Film Co., Ltd. Sheet package production system
WO2005035369A1 (en) * 2003-10-07 2005-04-21 Orient Instrument Computer Co., Ltd. Packaging machine and packaging method
US20130212982A1 (en) * 2010-11-05 2013-08-22 Grenzebach Maschinenbau Gmbh Device and method for quickly grouping picked goods for transport
US20160122049A1 (en) * 2012-03-16 2016-05-05 Will-Pemco Inc. Method and apparatus for wrapping a folio ream of paper

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343129A (en) * 1976-04-27 1982-08-10 G.B.R., Ltd. Mechanism of making an envelope
US4091596A (en) * 1976-05-25 1978-05-30 Enmail Machine Corporation Method of and apparatus for manufacturing envelopes
US4400929A (en) * 1980-03-03 1983-08-30 Yuwa Sangyo Kabushiki Kaisha Apparatus for forming box-shaped covering body
US5402620A (en) * 1991-07-05 1995-04-04 O.M.G. Di Giorgio Pessina E Aldo Perobelli S.N.C. Device and method for closing and laterally sealing plastic film wrapped bundles containing sheets or the like
US5404694A (en) * 1992-03-03 1995-04-11 G.D Societa' Per Azioni Method of producing cartons of cigarettes
US6612100B1 (en) * 1999-08-23 2003-09-02 Fuji Photo Film Co., Ltd. Sheet package production system
WO2005035369A1 (en) * 2003-10-07 2005-04-21 Orient Instrument Computer Co., Ltd. Packaging machine and packaging method
US20060053751A1 (en) * 2003-10-07 2006-03-16 Tomoaki Ito Wrapping device and wrapping method using the wrapping device
US20070227100A1 (en) * 2003-10-07 2007-10-04 Orient Instrument Computer Co., Ltd. Wrapping device and wrapping method using the wrapping device
US20130212982A1 (en) * 2010-11-05 2013-08-22 Grenzebach Maschinenbau Gmbh Device and method for quickly grouping picked goods for transport
US9764909B2 (en) * 2010-11-05 2017-09-19 Grenzebach Maschinenbau Gmbh Device and method for quickly grouping picked goods for transport
US20160122049A1 (en) * 2012-03-16 2016-05-05 Will-Pemco Inc. Method and apparatus for wrapping a folio ream of paper

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