IE46072B1 - Textile material packaging apparatus - Google Patents

Abstract

There is provided an apparatus for wrapping commodities, which may be compressible, and a corresponding method, in which a commodity is conveyed along a fixed path, a pair of opposed lengths of wrapping material are fed in an opposed relationship and in registry, the commodity is inserted between the opposed lengths of the wrapping material which have a leading end which has been sealed to form an open-sided and open-trailing end envelope, the lateral sides of the wrapping material are then sealed, and thereafter, a bag length is severed from the pair of lengths of wrapping material and sealed. Preferably, the commodity is fed under compression in between the opposed lengths of wrapping material, maintained under compression while the wrapping material is side-sealed and is vacuum-packaged while also under compression.

Description

This invention relates generally to an apparatus and method for packaging or wrapping systems. This invention relates to the treatment of goods or wares to be packaged or wrapped in a wrapping material.

Packaging of various commodities - e.g. consumer goods is common in the manufacture and distribution of such goods between the point of manufacture and the locus of distribution. Transportation and handling costs have, in recent years, increased significantly and as a result, the cost of goods has also increased, 10 Such transportation costs are not only dependent on the weight of the products but also on the volume of space such goods occupy.

Thus with bulky goods, it has been recognized that by reducing their bulk or volume the overall costs may be reduced and a more efficient operation can be obtained. j_5 Most commodities, particularly consumer oriented ones are in fact packaged usually with an overwrap for protective purposes for shipment from a manufacturer to a distribution point. Thus, it would also be desirable to develop an efficient and economical system for packaging bulky compressible commodities 2o in conjunction with an overwrap system.

According to the invention, there is provided an apparatus for wrapping and vacuum packaging a commodity comprising supply means for supplying a length of wrapping material, means for supplying a commodity, means for enveloping said commodity in said wrapping material, first and second opposed surfaces mounted in opposed relationship and defining therebetween a commodity receiving area, said first surface being deformable in said commodity receiving area, means for supporting said first surface in a spaced-apart relationship relative to said other surface, means said for causing/first surface to be brought into contact with said -246072 caimcdity in sail caimcdity receiving area whereby said first surface is initially defannal in said, conmcdity receiving area and subsequently outwardly therefran to reduce entrapment of air in packaging the ccmncdity.

The invention also comprises a method of vertically wrapping and subsequently vacuum packaging of a conmcdity in a flexible airtight package comprising the steps of supplying a length of flexible air impermeable wrapping material, vertically advancing said material in a predetermined fixed path fron a first vertical station to a second vertical station, vertically positioning a ccrnnodity to be wrapped in the direction of vertical sdvancsnent of said material between said first and second vertical stations and in said fixed path, vertically enveloping said canmodity with said material as said material advances from said first vertical station to said second vertical station to enclose said catmodity within said material, and subjecting said enveloped ccnmcdity to a vacuum packaging step in which said conmcdity is initially compressed centrally and thereafter progressively outwardly.

The above wrapping and vacuum packaging apparatus and method is particularly adapted to be employed in a system far conditioning a fihrous material such as is in the form of a caimcdity - e.g. a textile material or taitile garment, cushion cr the like. In the overall system, there may be provided a treatment zone and a stabilizing zone, preferably in camunication with each other with conveying means for conveying a caimcdity to and through the zone, during which a caimcdity is conditioned for subsequent wrapping and vacuum packaging. Such a system far conditioning will include means far providing a source of conditioning air, as otherwise outlined, laving a predetermined relative himidity and temperature requirements, ard far introducing a flow of the conditioning air into the treatment zones. There is also provided means far introducing a flow of the air into the stabilizing zone ard means for r amoving the treatment and stabilizing zone spent conditioning air. - 3 For use in carrying out the above, the conditioning 6 0 7 2 apparatus may also include a loading or receiving port in communication with the treatment zone and a discharge port for the stabilizing zone. Any suitable conveying means may be employed for conveying a commodity to and through the conditioning apparatus, A retention or like chamber may be associated with the discharge port of the stabilization zone for retaining textile materials for subsequent processing. Typically, the conditioning apparatus may be a continuous tunnel varying in length and width depending on the type of material being treated - a suitable tunnel for textile material such as coats, jackets, etc. may be 5 - 40 meters. Each of the treatment and stabilizing zones may involve two or more stages each preferably including separate means for introducing the flow of conditioning air and means for withdrawing spent conditioning air at the respective stage. Preferably a balanced overall system is employed and the number of stages will depend on the type of product being conditioned witli two or more stages being typical. Circulating means such as fans may be provided for each stage.

To supply conditioning air, any suitable means may be provided, This invention preferably carries out the process described in Pqtent Specification No. 46073 in which it is disclosed and claimed that fibrous materials such as textile materials, which are to be vacuum packaged, are conditioned by treating the materials to expose them to a gaseous environment sufficient to reduce the segment mobility of the fibers to a level below the segment mobility level of the fibers prior to treatment and which may be carried out in. the treatment zone of the apparatus herein. Likewise, the relative regain level of the fibers, in the treatment zone, are lowered or reduced to a level below that level of the -4fibers prior to treatment, whereafter in the stabilization zone the segment mobility of the fibers is stabilized and following thia, the textile materials may be then packaged while the segment mobility and moisture regain levels are at the reduced - and stabilized level.

In the apparatus of this invention, therefore, means for supplying conditioning air, may be any suitable means commensurate in scope with the teachings of the aforementioned patent or in the event that other general processing is j.0 carried out such conditioning means can be varied as desired.

Typically, according to the teachings of the aforementioned patent the conditioning air provided in the treatment zone will have a relative humidity of less than abut 30¾ and a temperature below about 35°0.

The apparatus of the present invention which is eminently suitable for carrying out the process of the above aforementioned patent , can provide treated or conditioned textile materials in a relatively short period of time, typically, from 3θ minutes to 2 or 3 hours with 1 hour being /0 normal for garments such as coats, jackets, suits or the like. The conditioning apparatus utilizes a mixture of ambient air and conditioned air which has been treated to remove the relative humidity and to cool the air at the same time.

Using this apparatus, and with the teachings of the copending application, the method of the copending application may be carried out in very short periods of time.

This invention also provides a device for mounting and suspending a commodity e.g. coats, etc., to be wrapped and which may be incorporated into and form a portion of a ° vacuum packaged product so that the wrapped product can be readily suspended from a rack. -5One form of the device has a body portion for mounting or suspending a commodity, a hook portion spaced from the body portion for suspending the resulting wrapped commodity from a rack, etc., and a thin, flexible heat-sealable ligament between the body portion and the hook portion. In one form the body is a hanger-shaped portion e.g. of conventional construction to retain the coat with the ligament being connected to the body portion at one end and to the hook portion at the other end. Thus, the ligament may be incorporated into a package 3_q with the hanger located within the package and the hook located exteriorly of the package, and when the opposed walls of the package are sealed together, the ligament is actually incorporated into the seal. The ligament may be fixedly secured by means of adhesive, heat sealing etc., to the hanger if it is made of appropriate plastic material ox· the hanger may be provided with an aperture with the ligament extending to che aperture. The ligament may also be a continuous band with the band hooking onto the hook portion and extending to the aperture.

In a further form, the hanger portion may be in a 20 conventional form but with a continuous band provided between the hook of the hanger and the hook portion which suspends a wrapped commodity from a oari'ier. The ligament may be made of any suitable material - e.g. the same material as the wrapping material, and preferably the ligament is of a relatively thin nature.

A wrapping assembly comprises supply means for supplying a length of wrapping material having opposed wall sections, means for engaging and maintaining the opposed wall sections of the leading portion of the wrapping material in a spaced apart manner to form an open-top enclosure adapted to receive a commodity, means for advancing the wrapping material with the walls in a spaced apart manner from -6an initial starting position to a second or terminal vertical position along a predetermined path, means for vertically mounting a commodity to be enveloped by the wrapping material in the predetermined path so that when the advancing means 5 advances the material from the first or initial position to a second or terminal position, the commodity is enveloped by the material as the material advances between the first and second positions. Conventional supply means for supplying a length of wrapping material may be used and preferably the arrangement described herein is utilized. While the supply means may supply an endless tube, the wrapping assembly of this invention may also be used for lay-flat film, G or U film, etc.

In the wrapping assembly, the most preferred form of the advancing means for maintaining the walls of a tube in an open condition comprises a pair of gripping means, preferably with.· suction or vacuum heads. This same means, travelling from the first to second vertical position will thus permit a vertically aligned or hung garment to be enveloped. The first station or starting station may be defined as a position at which the vacuum or gripping heads engage the leading portion of tubular material while the upper or second station is che point at which the garment is completely enveloped by the wrapping material. The assembly preferably includes a movable means reciprocating between the stations with appropriate control means for carrying out the various functions. Sealing means for the various forms of the wrapping material can be employed, which may be a part of the advancing assembly or alternatively separate components. Such sealing means preferably cq operate in conjunction with the gripping means. -7The vertically oriented wrapping assembly of the present invention, in contrast to the horizontal arrangements of the prior art, provide significant advantages for wrapping garments or other similar textile materials, which may be suspended by means of a hanger or the like. The presently vertically oriented wrapping apparatus provides a greater degree of control compared to horizontal apparatus which may require additional components or labour compared to the apparatus of this invention, The wrapping assembly may also have means for temporarily suspending or mounting a commodity at the wrapping station and for transporting it for subsequent processing.

Such transport means or system advances the commodity between processing stations such as the wrapping and vacuum packaging stations and preferably comprises guide means extending between first and second processing stations, a pair of opposed gripping means movably mounted on said guide means, means for advancing said gripping means between said first and second processing stations, means for reciprocating’ each of said gripping means into and out of package engaging and package releasing positions at said first and second stations respectively, carrier means for supporting and suspending a commodity to be packaged, and means associated with said carrier means for disengaging a commodity from the carrier means. in the transport system the guide means may be any suitable component,e.g,, guide rods, etc., mounting the gripping means which preferably are in the form of gripping fingers engaging the interioi' of a bag with a suitable carriage or frame assembly being provided on which the gripping means are mounted and which carriage assembly goes between the respective -8processing stations. This may be a reciprocal type. The 4β( gripping means also includes a component for bringing such means into and out of package engaging and package releasing positions with the different components of the transport 5 assembly being operated in time-related sequence. Means may also be provided for removing a hanger from the transportation system which may take the form of a pair of fingers or plates for engaging the hanger and displacing it upon actuation of e.g. a piston or the like.

IQ The vacuum packaging assembly for vacuum packaging a textile product preferably is in the form of a device comprising a first surface, a second opposed flexible pressure-deformable surface mounted in operative relationship to said first surface with said first and second surfaces defining therebetween a commodity receiving area, said second member being deformable at least in said commodity receiving area, means for suspending said second pressure deformable surface in said spaced-apart relationship to said first surface, and means for creating a partial vacuum in said commodity receiving area to deform eaid second surface so that the central portion of said second surface is initially deformed in said commodity receiving area and subsequently outwardly therefrom whereby entrapment of air is minimized in packaging a commodity.

The vacuum packaging assembly may be provided with a pair of opposed flexible pressure-deformable surfaces - i.e. both of the above surfaces are flexible and deformable. At least one, or both, of the surfaces can be suspended in a spaced-apart relationship and the means for creating a partial vacuum to deform the pressure-defox'mable membrane can operate on one or both of such surfaces, -9_ 4Θ072 processing stations. This may be a reciprocal type. The gripping means also includes a component for bringing such means into and out of package engaging and package releasing positions with the different components of the transport assembly being operated in time-related sequence. Means may also be provided for removing a hanger from the transportation systea which may take the form of a pair of fingers or plates for engaging the hanger and displacing it upon actuation of e.g. a piston or the like.

The vacuum packaging assembly for vacuum packaging a textile product preferably is in the form of a device comprising a first surface, a second opposed flexible pressure-deformable surface mounted in operative relationship to said first surface with said first and second surfaces defining therebetween a commodity receiving area, said second member being deformable at least in said commodity receiving area, means for suspending said second pressure deformable surface in said spaced-apart relationship to said first surface, and means for creating a partial vacuum in said commodity receiving area to deform said second surface so that the central portion of said second surface is initially deformed in said commodity receiving area and subsequently outwardly therefrom whereby entrapment of air is minimized in packaging a commodity.

The vacuum packaging assembly may be provided with a pair of opposed flexible pressure-deformable surfaces - i.e. both of the above surfaces are flexible and deformable.

At least one, or both, of the surfaces can be suspended in a spaced-apart relationship and means for creating a partial vacuum to deform the pressure-deformable membrane can operate on one or both of such surfaces. -10the central portion of the flexible wall is capable of contac4·^ θ ? 2 ing the central portion of the commodity being vacuum packaged and then progressively going outward!}’ therefrom. It has bean found that using this arrangement and as described in greater detail hereinafter vastly superior results can be obtained as opposed to vacuum packaging using a rigid wall which compresses a commodity and exerts significant deleterious pressures on different portions of the packaged commodity.

For general purposes, either one or both of the above flexible and rigid walls may be movable into and out of engaging relationship. The rigid surface or wall may merely be a fixed plate rigidly secured to a suitable frame member.

It may be made of any appropriate material for this purpose.

On the other hand, the flexible air impermeable surface may be made of any material possessing the desired characteristics including air impermeable cloth, rubber, sheet plastic material or the like. Such material may be secured about its periphery to a suitable frame member with a sealing gasket or other like sealing structure being provided adjacent the edges of the flexible wall (or of the fixed wall) to define a vacuum chamber when the two walls are brought into operative spaced-apart relationship. The pair of walls forming the chamber are dimensioned so as to be substantially co-extensive at least in the area where the packaged garment is adapted to be contacted by the flexible wall.

A preferred vacuum chamber includes sealing means for sealing the top portion of the bag containing the commodity subsequent to the vacuum packaging step. Such sealing means are preferably mounted within the vacuum chamber and form a portion thereof. Sealing means, one mounted to each of the respective surfaces of the vacuum chamber, may be used with -1146072 means for reciprocating one or both sealing heads into and out of sealing engagement with the packaging material. Any conventional means for creating a partial vacuum within the chamber may be used.

The vacuum packaging device may also include means for mounting a packaged commodity within the chamber - e.g. means associated with the transport system may be employed for this purpose. Thus, with the carrier means of the transport system which suspends or mounts a device of the type previously described using a heat sealable ligament, the packaged commodity may be aligned in the desired position within the vacuum chamber and the flexible ligament being located at least partiaJLy within the package so that upon actuation of the sealing means for the package within the vacuum chamber, the sealing means may seal the ligament. However, other conventional hangers may be employed as desired.

The above-described vacuum packaging assembly may be used in the vertical mode as described above or may be likewise used in a horizontal mode again for packaging different types of commodities. Thus it is immaterial whether the assembly is vertically, horizontally or otherwise mounted.

An alternate form of the device also includes an arrangement permitting one or both of the surfaces or walls to be pivotably mounted relative to each other permitting one or both walls to be placed into operative sealijjg engagement, either directly or through frame members, using such a pivoting arrangement. -1246072 The packaging material used to package or envelop the commodities may be any suitable flexible substantially air impermeable material for vacuum packaging purposes.

Such materials are known in the art and generally comprise single or multi-layer plastic or plastic hybrids or even metallic foils. These generally comprise the polyolefins (homo- or copolymer)- and laminates of two or more extruded layers of the same or different material. Specific plastic materials are e.g. polyamides, polyolefins e.g. ethylene homo- and copolymers, propylene homo- and copylmers, and more complex polymers or copolymers, mixtures of these, etc. Laminates using different properties of two or more films are desirable packaging material. Other materials include plastic backed or coated -1346072 (one or both sides) paper materials, paper or plastic backed metallic foils, e.g. aluminum foils. The choice of any particular wrapping material will depend en the particular type of properties desired.

Various types of commodities may be packed by this invention. This invention may be used particularly to package bulky or voluminous products of natural or synthetic origin e.g. textile materials such as clothing, sheet material (e.g. bed coverings), cushions, etc. - successful tests have been made using overcoats, sweaters, shirts, jackets, suits, etc.

In the drawings, FIGURE 1 is a schematic overall view of the apparatus, FIGURE 2 is a section taken through the conditioning tunnel, FIGURE 3 is FIGURE h is FIGURE 5 is one embodiment of a garment mounting device,, an alternate garment hanger version, a schematic view of the wrapping and vacuum packaging units, FIGURES 6A to 6G are schematic views of the varying stages of operation of the wrapping device, FIGURE 7 is a schematic view of the lower-portion of the wrapping zone showing the feeding system, FIGURE 8 illustrates the cutting device, FIGURE 9 illustrates the sealing head, FIGURE 10 is a partial view of the drive system for the wrapping device, FIGURE 11 is a partial detail view of the cutting and sealing assembly, -1446072 FIGURE 12 is a schematic view of the transport device; y FIGURE 13 is a side elevational vies,! of FIGURE 12; - FIGURE 14 is a cross-sectional view through the sealing, cutting and vacuum device; FIGURES 15 A to 15 C are side and front elevational views showing the sequence of operation and transferral of the wzraeped article; FIGURE 16 is a perspective view of the vacuum device; FIGURE 17 is a top plan view of FIGURE 16; FIGURES 18 and 19 are cross-sectional views of the vacuum AO device, and FIGURES 20 and 21 illustrate an article prior to and after being vacuum wrapped.

Figure 1 illustrates the overall system and has an initial conditioning section 20, a stabilizing section 22, a retention zone 24, ' a wrapping station 26, a vacuum packaging zone 28 and a discharge zone 30.

A commodity to be wrapped, e.g. suits, is suspended on appropriate hangers at a loading station which has a continuous conveyor C with flights 32, each engaging a hanger 34 suspending the article, which advance the goods into and through the conditioning and stabilizing zones.

The conditioning zone comprises a series of stages or stations, coe of which is illustrated in Figure 2. Each station is a portion of a tunnel defined by upper and lewer walls 36 and 38 joining a pair of opposed side walls 40 and 42 to form an enclosure. At each zone, an inlet 44 is provided for introducing treated air supplied from a main air system. The treated air enters via a conduit 46 and exits via outlets entering into a collector system 50 which circulates it back to an air treatment device 52. This device conditions the air to provide the requisite tenperature and humidity. Each zone or station is provided with inlets 44 and outlets 48 to provide a generally balanced flow of air and to progressively treat the articles to Ise packaged. -1546072 Hie conditioning system may include e.c., two or three ocnditicning zones e.g, ZI and Z2, etc. havinn the structure of Finure 2. r Hie conveyor C transports the articles into the open tunnel. Following the zone Zi forming a portion of the conditioning zone, the balance of the system through to the storage area forms a conditioning zone in which the treated and stabilized articles are retained under generally stabilized tanperature and relative humidity conditions. Hie stabilizing system may include zones Z3 through Z5 each likewise being provided with air inlets and discharge conduits as per Figure 2 for providing the stabilizing conditions.

Hie conditioning and stabilizing tunnels may form a continuous closed system and may be of various shapes e.g. an elongated tunnel or as shown in the drawings, a U-shaped” arrangement.

At the retention zone, the stabilized articles are maintained 15. under the desired humidity and temperature conditions for subsequent wrapping and vacuum packaging. Hie conveyors discharge the articles from conveyor C by any suitable means onto a feeding line 54 where they are stored until required. Retention area 24 is provided with a pair of sliding doors 55 which operate with the wrapping station to permit a single article to be discharged when required. Suitable conventional means may be provid’d for advancing a treated article from the retention area to the wrapping station.

Figures 3 and 4 show two versions of suitable mounting means for articles such as clothing. Each includes a suitable hanger shaped body 60 for mounting clothing .with, as per figure 3, a wire or like member (a hook) 62 projecting from the top. Hook 52 is connected to a further hook 64 engaging the conveyor system and a transport system. Hook members 62 and 64 are connected by a special ligament 66 comprised of a heat sealable, preferably flexible, material. Hiis ligament 66 is adapted to be sealed in and form a portion of the wrapped package. In Figure 4, the ligament 66' is -16incorporated into a portion of the hanger 60 so an to provide direct 4 6 0 7 2 mounting of the hanger 60 to the hook member 64 so that the ligament 66’, I passing through a slot 68, takes the place of the hook 62 in Figure 3.

Figure 5 et seq shew the wrapping apparatus, the frame members -ι, are shown by reference letter F.

Referring to Figure 7,a material supply system far enveloping or wrapping a caimcdity comprises an erdless syntehtic plastic tube 70 mounted (rotatably) on a pair of drive rollers 72. Rollers 72 are mounted by rreans of shafts to frame F, each shaft having a gear 74. A motor 76 is p0 provided with drive shaft 78 extending into a gear box 80 and which has an output gear 82. Drive belt 84 engages each gear 74 and 82 to rotate shafts 72 and thus drive the roll 70.

A guide shaft 86 is rotatably journalled in a pair of mounting brackets 88S over which the web W passes in the feeding direction. Fixedly secured to the shaft 86 is a pair of mounting brackets 90 (Figure 7) journalling a shaft 92 therebetween. Shaft 92 rotates about the axis of shaft 86. Mounted relative to the rotation of the shaft 92 is actuation means for the motor 76 e.g. micro-switch 94 so that with the rotation of shaft 92 by advancement c& web W, shaft 92 or-the mounting bracket 90 is effective to abut the microswitdi 94 to initiate the drive cf the motor 76 to rotate shaft 72 and advance a predetermined amount of material from roll 70.

Wrapping material W from the roll 70 passes under guide bar 98 journalled by frame members F and which position web W in vertical alignment for the wrapping operation.

Hie wrapping unit has a vertically movable web advancing, sealing and cutting assembly (Figure 5 et seq). livable frame 100 is capable of being raised and lowered between first and second positions by a pneumatic cylinder system 102 which includes a connecting rod 104 secured to the frame member 100, Frame 100 is guided on opposed guide rods 106 (Fig 10)by 3° guide bushings 108. Referring to Fig. 10, frame member 110, at the rear of the wrapping unit, includes a rack ard pinion drive system 112 with pinion 114 being rotatably journalled to frame 100 and in engagement with rack 116. Mazsnent cf -174 @ Θ 7 2 fraiie 100 frcm tire lower to upper position drives pinion 114. On shaft 118 for the pinion is a drive pulley 120 which is rotated by the rotation cf pinion j 114 - it serves to drive fet’d rollers 122 by roar wheel 124 nounted on an extension of frame 100 and with each roller 122 being provided with shaft 126 having a drive wheel 128. Belt 130 extends about the drive wheels 124, 128, and 120, so movement of frame 100 in a vertical manner rotates the rollers 122.

A converging trough 134 aids in guiding an article to be wrapped and is located above rollers 122 with the converging mouth aligned with the top portions of rollers 122. Trough 134 is mounted by brackets 136 to frame 100.

Figure 11 shews frame 100 having pairs of mounting blocks 140 and 142 for mounting shafts 126 of rollers 122. Mounted on the frame is a pair (one being sha.-.n) of guide rods 144 journalling a sliding sealing and suction head. Shaft 144, journalled by bushings 146 to the frame 100, permits the vacuum and sealing head to reciprocate inwardly and outwardly by a pneumatic piston assembly 102 with a piston 150 •with a rod 152, Ihe reciprocating portion of the vacuum and sealing head has frame 154 journalled to rod 152 by clamp 156. Frame 154 has a vertical frame 158 (Fig. 14) -mounting vacuum and sealing mambers. There is provided, similarly, a fixed plate 162 on frame 100 and an upper sealing head 164 cooperating with opposed sealing head 166; in a like manner, lower vacuum chanter 168 cooperates with a movable vacuum chanter 170 associated with the movable assanbly of Fig. 11.' The movable portion of the vacuum and sealing assembly is mounted on guide rods 144 by bushings 182 journalled on guides 144 so reciprocation of rod 152 causes movement between first and second positions, The vacuum system (Fig. 14) includes chambers 169 and 171 each connected to conduit 173 connected in turn to a vacuum source (not shewn).

Ciambers 169 and 171 include apertures 175. The sealing heads (Fig. 9) include a body 200 with a recess 202 mounting resilient backing -18member 204; an overlying heat dissipation wire mesh layer 206; a Teflon (Registered Trade Mark) backing layer 208; heating element 210 and a facing 212. Tape 214 or like means secures the facing 212 to the body 200.

The cutting assembly comprises a shaft 216 (Fig. 8) mounted by suitable means (not shown) onto frame 162 (Fig. 11) In Fig 8, the shaft 216 includes slot 218 extending therefrom; mounted interiorly of shaft 216 is a movable cylinder 220 carrying a knife 222 projecting through etc. Cylinder 220 reciprocates from one end of the shaft 216 to the other by pneumatic pressure using conduits 224 located at either end of the shaft 216 connected to pneumatic and timing systems (not shown).

Figures 5, 12 and 13 show the transport system for moving commodities between a first station(the wrapping station) and a second station(the vacuum packaging station). It operates in conjunction with the wrapping station, and includes frames 300 journalling guide rods 302 which mount frame 304 associated therewith by bushings 306. Bushings 306 slide along guide rails 302 and are driven in a reciprocating motion by piston 308 having a slot 310 with a projecting member 312. This latter member is driven by piston 308 to reciprocate the transport system between first and second positions. Piston 308, like assembly 102, is known in the art as Orega ( Trade Mark) system.

In Fig. 13, the member 312 is connected to plate 314 fixed to plate 304. Plate 304 mount bushings 316 each slidably mounted on a guide 318 secured to housing 320.

Piston 322 is secured to plate 304 with piston rod 324 extending therefrom and fixed to housing 320 by bushing 326. Piston 322 is thus effective to raise and lower housing 320 in a vertical displacement so the housing 320 is vertically displaced by guides 318 sliding through bushings 316.

Housing 320 (Fig. 12) includes interiorly fixed frames 330 suspending pneumatic cylinder 332 with piston rod 334 mounting block 336. L shaped fingers 338 extend from the block 336 and include a downwardly -194®©72 Extending portion terminating in hook 339 so that fingers 338 reciprocate between first and second positions through slots '( 340 using piston 332.

A pair of vertically aligned fixed plates 344 act as 5 stop plates upon the reciprocation of the transport system.

A buffer device 3h6 having a spring loaded cartridge 348 with movable finger 35θ is used for this purpose. Finger 35θ abuts plate 344 at each end. Figs. 12 and 13 show the transport device as including a carrier for mounting a commodity and transporting it between first and second stations. Hook 352 which is used for this purpose is fixed to plate 30^· Other like arrangements may be employed for this purpose - the hook 352 may include means for use in removing a garment from the hook at the vacuum packaging station, etc.

In operation of the above, a commodity e.g. a garment is discharged from station 24 by a sloping guide 54 terminating adjacent hook 352 when the carriage is in the first position at the wrapping station. The conveyor system C (Fig. l) preferably comprises rollers 33 journalled by a shaft rotating on the conveyor and advanced by flights 32. Rollers 33 include hook member 35 mounting hooks 64 (Figs. 3 and 4) so that when a conventional transfer mechanism (not shown) in chamber 24 discharges the garment, rollers 33 slide down rod and are subsequently positioned to straddle the hook (Fig. 154·).

Once the garment and its respective hook are mounted on hook 352, the wrapping operation is commenced. Upon a garment being delivered to hook 352 and to stabilize the garment and dampen its swinging movement as well as to aid in positioning the garment over the trough, brushes or bristles 163 as shown (Fie· 5) may be used. Backing plates l6l mount rolls of bristles 163 so that a garment as delivered to the wrapping station will abut the bristles. A preferred form is where the -2046073 bristles are flexible and slope downwardly so the garment, when delivered, will abut the bristles and cause them to bend J downwardly further and thus enhance the dampening motion.

For commencing the wrapping operation, the movable 5 frame members are in the lowermost position beneath the garment (Fig. 6a), In start-up, or from a previous operation, the wrapping material is brought into engagement with vacuum heads 168 and 170 (Kig.l4) so that the tube has an open mouth dimensioned to receive the product e.g. a coat or jacket 400, 1q With the vacuum on, and the walls of the tube against the respective vacuum heads, means may be provided to ensure that the coat arms will enter into the mouth of the trough. In Fig. 5, spaced-apart arms 181 aid 181' mounted by member 183 on a rotatable shaft I85 are connected to a drive 187· Arms 181 and 181' each include a U-shaped channel member I89. When the garment is positioned as in Fig. 6A, the arms 181 aid 181' are actuated by suitable conventional means to rotate inwardly (Fig. 6b) so that the direction of rotation engages the garment sleeves and by further rotation, presses the arms inwardly and downwardly towards the trough 134.

The assembly of Fig, 11, driven by cylinder 102, then moves from the lowermost position or first station upwardly (Fig. 6C) to advance the wrapping tube upwardly about the garment. Rollers 122, rotated by the upward movement of the assembly of Fig. 11, aid in placing the garment in the open-mouth endless tube. Figs. 5, 10 and l4 illustrate a further aid for ensuring that the sleeves are placed within the trough and aligned for insertion into the tube; there may thus be employed a pair of conduits 191 at the ends of the trough 134 directing air jets onto the Sides and including the sleeves of the garment. -214 6 0 7 2 As assembly (Fig. Il) advances vertically upwardly, microswitches or the like detect the movement and cause the J j rotation of the arms upwardly to their original position (Fig. 6C). The assembly continues advancement to the uppermost position or second station (Fig. 6D) where the tube extends beyond the garment. The fingers 338 of the transport system, previously brought into a closed position, are then actuated so they extend outwardly or laterally to engage the side edges of the wrapping tube (Fig. 6e). The fingers 338 then assume control of the tube with the garment therein, and the assembly commences downward movement.

Vacuum to the vacuum heads is cut when the fingers have assumed control of the wrapping tube to permit downward movement of the assembly.

' When the assembly returns to the lowermost position, it severs and seals the lower portion of the endless tube to thereby form the bottom of a bag. The vacuum of the vacuum heads is re-established to engage the opposed walls of the continuous tube and subsequently, the heat sealing and severing operations are performed by reciprocation of piston 150 (Fig. 11) bringing sealing head 166 irrto engagancnt with sealing heed 164 (Fig.14) aM by actuation of knife 172 (Fig.8).

Subsequently, arm 181' is rotated 90° to the vertical behind the wrapping unit to permit the transport system to transport the wrapped or enveloped garment frcm the wrapping station to the vacuum packaging station (Figs. 6F and 6g), with the wrapping station being ready to receive a further garment.

In Figs. 5 and l6 to 19, the vacuum packaging system is illustrated with reference F designating frame members. Frame 300 is vetically mounted and as will be seen from Fig. l6, the transport system delivers a suspended -221 garment to the vacuum packaging station on guide rods 302. 460 72 When the trasnport system is at the vacuum packaging station, t the hanger 64 i3 transferred to a further hook 402 for· positioning the garment at the vacuum packaging station, and the transport system returns to it3 initial station.

The vacuum packaging station has a non-flexible plate 404 secured to frame F forming one wall of a vacuum chamber. Wall 4o4 is non-movable and terminates at the upper position in a chamber 4θ6. Operating with wall 404 is a further wall of flexible material mounted within a frame or housing 4θ8, and which comprises side walls 4l0 defining an enclosure and extending to the top of the chamber 406.

Housing 408 includes a flexible layer of air impermeable material 412 essentially forming a flexible disphragm and which is fixedly secured around its edges to the sides of Mousing 408. As will be noted, the flexible surface 412 is spaced from the surface 404 and the two surfaces define therebetween a commodity receiving area where the packaged commodity is to be vacuum packaged. The periphery of surface 4x2 is mounted at a point spaced apart from surface 4θ4 in such a manner that upon surface 412 being drawn inwardly by the creation of a vacuum, the central portion of the surface 412 is initially deformed in the area where the commodity is located and then subsequently outwardly therefrom.

By mounting the peripheral edges of surface 412 in a manner spaced from surface 4θ4, channels will be formed about the periphery of the surface, to reduce or prevent entrapment of air. Generally speaking, the degree to which the periphery of the flexible or pressure-deforinable surface 412 is spaced from the surface 4θ4 should be sufficient so that upon creation of a vacuum to the desired degree the deformable portion -23,. z-.ir, n of the surface 412 is not higher than the highest portion of the fl O U ί A commodity being vacuum packaged a3 this might otherwise prevent progressive outward deformation of the surface 412. To this end, the periphery of the deformable surface 412 is mounted by suitable means and is shown in Fig. 18. Suitable means to secure it to the peripheral portions of the housing 408 may be employed. Alternately, an adjustable means may be provided for varying the distance to and from the surface 404 for packaging different types of commodities. Air communication is provided between the outer side of flexible layer 412 and the back wall of the chamber 408 - in an alternate form there need not be provided a rear or side walls and instead a frame may merely mount the flexible sheet 412.

Housing 408 is provided with a sealing gasket 4l5 to form a vacuum chamber, in conjunction with the flexible wall 412, and the rigid wall 404, when the two walls are brought inco operative relationship with each other. Wall assembly 408 is movable on frame F for reciprocating into and out of operative engagement with wall 4θ4; flanges 4l4 are slidably journalled on guide rods 4l6 by bushings and a piston assembly 4l8 is provided with piston rod 420’ secured to the assembly 408. Actuation of piston 4l8 brings the flexible xvall into and out of engagement with the rigid wall 404.

Within the vacuum chamber are a pair of cooperating sealing heads one associated with wall 404 and the other with movable wall assembly 408. Both are secured by brackets 422; however, in the case of one of the sealing heads 421 , it is mounted by bracket 424 to piston rod 426 of piston 428 to bring it into and out of engagement with the opposed sealing head Sealing heads 420 are similar to those described previously. -244 6 0 7 2 Λ pair of spring loaded clamps 430 and journalled by brackets 43¾ are adapted to position the package to be sealed. One or both of these clamps are provided with spaccd-apart passages 440 (Figs. 17, 19) to permit air to be . drawn from the chamber formed by the cooperating wall surfaces in which the package .is located. A vacuum source (not shown) is connected to conduit 442 leading to chamber 4θ6, and creates a partial vacuum in the enclosure formed between the cooperating walls 4θ4 and 412. The above-described arrangement provides a vacuum packaging system in which the flexible wall is initially drawn against the central portion or area of the garment to be vacuum wrapped upon creation of a vacuum in the chamber. Thus, inward movement of the flexible wall 412 Initially contacts the central area or portion of the wrapped garment due to the fact that the peripheral portions of the flexible wall 412 are mounted above the commodity and in a manner spaced from the surface 404 . Thus, even when the membrane 412 is collapsed due to a high vacuum against the commodity being treated and the surface 4o4, the normal resistance to bending or deformation at right angles (as opposed to less acute bending) will leave channels about the side walls of the housing. Upon suction being further applied, and as outlined above, the flexible wall progressively contacts the commodity from the central area outwardly with the result that entrapment of air is minimized or eliminated from the packaged commodity. Due to this, there is provided a significant improvement in the vacuum packaging of commodities compared to the use of solid plates or tho like proposed by the prior art for compressing and vacuum packaging commodities. Still further it will be appreciated that by using a flexible -254S073 or deformable membrane, substantially equal pressure is applied to the commodity throughout all portions of the commodity by creation of the vacuum and again, this avoids the deleterious effects of using a substantially flat plate or the like to '5 compress and vacuum package a commodity where significant pressures would be applied to any irregularly shaped portion of a commodity. This feature provides many desirable attributes to the vacuum packaging operation.

During the sealing operation, the heat-sealable ligament 66 is sealed and forms a portion of the seal about the package to permit an airtight enclosure to be formed. However^, if desired, conventional hangers of metal or the like may be employed by using flexible sealing heads to tightly seal the bag about the metal hanger.

An improved vacuum packaging assembly comprises the above arrangement but utilizes on the outer face of deformable membrane 4.12 pleasure creating means in place of the vacuum creating means whereby the means for creating a partial vacuum may be eliminated. Alternately, 2Q 3uch pressure creating means to aid in the deformation of the membrane 412 may be employed in conjunction with the means for creating a partial vacuum. Likewise, a further embodiment utilizes a pair of flexible membranes whereby the rigid wall 4o4 may be dispensed with and a membrane similar to membrane 412 may be employed in its place. If desired membrane 404 may likewise be suspended in a manner similar to membrane 412 although it is onlj’ necessary that one such membrane be so mounted as shown in Fig. 18. Where two flexible deformable membranes are employed, both may be operated by means of pressure creating means (using air pressure introduced into an enclosed chamber behind the respective membranes). In some cases, it may be desirable to combine such an arrangement with -26vacuum means as described with respect to Fig. 18 to aid in the vacuum packaging operation, j The transfer sequence (Figs. I5A to I5C) for the sealed vacuum packaged garment employs a carrying hook 352 associated with the trasnport device, which in turn carries spaced-apart rollers 33 with a depending hook 35 mounting the hanger 64. It operates as follows: hook 402, rotatably driven by motor 460, is positioned in alignment with hook 352 where the transport system arrives at the vacuum packaging unit upon reciprocation of the former. Movable fingers 35^ (Figs. 12 and 135» mounted on a pivot point 356, sre free to rotate about a horizontal axis so fingers 35^» upon actuation, engage a respective one of the pulleys 33 to advance them onto hook 402. The fingers may be conventionally actuated by e.g. a piston mounting a piston rod 462. Rod 462 abuts the fingers 354 to pivot the same and push the wheels 33 with its attendant hooks 35 onto the hook 402.

Hook 402, mounted at a slight angle from the vertical, is capable of pivoting about its axis 9θ° by motor 460. Take20 off rod 464 receives the wrapped vacuum packaged goods following completion of the vacuum packaging and once the operation has been completed, motor 460 is actuated to rotate the hook 402 90° to place the rollers 33 in a position to engage the rod 464. Thus, upon rotation (Fig. 15c) the terminal portion of the hook no longer functions to retain rollers 33 and they slide off onto rod 464. Rod 464 delivers the wrapped goods to storage area 480 shown in Fig.l viiich may ccmprise a plurality of rods 482 associated with the red. 464.

Figures 20 and 21 illustrate a cushion which may be wrapped and vacuum packaged. The cushion has a covering enveloping a compressible foam core and which may typically have a dimension of e.g. .5 - 1 meter in width and length and a -27aou i 'height of e.g. .25 - .3 metres. Figure 21 illustrates tho same product after processing with the width and length of the compressed pi’oduct being substantially similar to that of the unpackaged product but the height has been compressed to approximately one fifth of the size.

All of the components of the system described herein may be operated in time-related sequence with conventional control means well known to those skilled in the art. Thus, the function of each component may be operated in a time-related sequence to other components with the whole assembly being controlled by an appupriate control system. As indicated, such systems are well known to those skilled in the art and no detailed explanation is required.

The following example following the teachings of Patent Specification No, 46073 will servo to illustrate the various aspects of the apparatus of Figures 1-21.

The apparatus previously described was employed in which the conditioning system contained two zones - i.e., the treatment zone and the stabilization zone. Each zone is provided with a plurality of air ducts located at the top of the tunnel and with a corresponding number of circulation fans at the bottom, and with ail* inlets being provided.

Conditioning air was provided for by passing a mixture of ambient air from outside the tunnel and air in the tunnel through dehumidifying and cooling machines to provide conditioning air. The conditioning air provided for the stages of the treatment tunnel range from 3θ 2O°C, and 30 - 15% relative humidity; and in the different stages of the stabiliza30 tion zone, 20°C - 15°C and 12% - 5% relative humidity. Control -284 6 Ο 7 2 means for introducing the conditioned air were provided to obtain a balanced air flow in each zone and preferably in each stage of each zone.

Samples of men's suits of 100% wool, were introduced into the conditioning system at the inlet port. The ambient atmospheric conditions were approximately 30°C and 60% relative humidity. The system was set for an operational time limit, from entering the treatment tunnel to the discharge, of approximately 60 minutes. The initial treatment stages were sot in operation with conditioned air being introduced at a rate of 400 liters per second. In the stabilization zone, conditioned air was introduced at about 200 liters per second with air temperatures in the initial portion of the treatment zone being about 30°C. and in the later stage of the treatment zone approximately, 20 - 13°C. The air temperature in the stabilization zone was maintained at a constant 15 - 20°C.

The garments were subjected to treatment using the conditioned air to dehumidify and condition the garments for a period of approximately 30 minutes. It v/as found, after running the system, that as a result of the conditioned air being introduced, and the mixture of conditioned air and ambient air, a mixture was obtained in which the relative humidity varied from approximately 3°% at the initial stage of the treatment zone to approximately 15% at the end or latter stage of the treatment zone. In the stabilization zone, the relative humidity was maintained at a constant 10%.

The length of the treatment zone was 10 meters with a height, of 2 meters and a width of SO centimeters. The -294 6 Ο 7 Si stabilization zone had a Length of 10 meters with air being removed at ASO liters per second (with a total of 1200 cubic meters per hour being removed from both zones).

Upon exiting from the stabilization zone, the garments were tested and found to contain a moisture regain corresponding to equilibrium in air, of 10 - 12?ό relative humidity, and 20°C. These garments were subsequently wrapped and vacuum packaged using the apparatus described above. Packaging reduced the volume of the garments, depending on the type of garment, to between l/3 - l/2 of their original volume. The garments were stored for 1 week and the vacuum, packaging removed. Such garments were found to be substantially free from wrinkles and in a totally acceptable commercial condition.

If desired, following removal of the vacuum packaging from the garment, the product may be recon<£tioned by exposing the same to relative humidities of 5θ/^ or greater and temperature conditions of 20 - Α5°θ· In effect, this reconditioning step speeds the recovery of the garment from its compressed state to its normal original condition without having to wait for longer periods of time.

Various changes can be made to the above-described apparatus without departing from the invention as will be appreciated. Thus, for example, the vacuum may be withdrawn at any desired location from the chamber and rather than as illustrated, from both ends or through the fixed wall provided it is not in the area where the commodity Ls packaged, etc.

Claims (22)

1. CLAIMS:1. An apparatus for wrapping and vacuum packaging a commodity comprising supply means for supplying a length of wrapping material, means for supplying a commodity, means for enveloping said commodity in said wrapping material, first and second opposed surfaces mounted in opposed relationship and defining therebetween a commodity receiving area, said first surface being deformable in said commodity receiving area, means for supporting said first surface in a spaced-apart relationship relative to said other surface, means for causing said first surface to be brought into contact with said commodity in said commodity receiving area whereby said first surface is initially deformed in said commodity receiving area and subsequently outwardly therefrom to reduce entrapment of air in packaging the commodity.

2. An apparatus as claimed in claim 1 wherein the second surface is a rigid surface, said opposed flexible pressure-deformable first surface being mounted in operative relationship to said second surface with said first and second surfaces defining therebetween the commodity receiving area, and means for applying pressure to said pressure deformable surface exteriorly thereof to deform said first surface in said commodity receiving area so that the central portion of said first surface is initially deformed in said commodity receiving area and subsequently outwardly therefrom, whereby entrapment of air is reduced in packaging a commodity.

3. An apparatus as claimed in claim 2 further including a transport device for advancing and controlling the commodity between wrapping and vacuum packaging means comprising guide means extending 46078 between said stations, a pair of opposed gripping means movably mounted on said guide means, means for advancing said gripping means between said stations, means for reciprocating each of said gripping means into and out of package engaging and package releasing positions at each of said stations, carrier means for supporting and suspending the commodity to be packaged, and means associated with said carrier means for disengaging the commodity from the carrier means.

4. An apparatus as claimed in claim 1, 2 or 3 wherein the wrapping means comprises a wrapping assembly having supply means for supplying a length of wrapping material having opposed wall sections, means for engaging and maintaining the apposed wall sections of the leading portion of said wrapping material in a spaced-apart manner to form a commodity-receiving space, means for vertically advancing said wrapping material with si id walls in a spaced-apart manner from a first vertical position to a second terminal vertical position in a predetermined path, means for vertically mounting a commodity to be enveloped by said wrapping material in said predetermined path whereby when said advancing means vertically advances said material from said first position to said second position, said commodity is enveloped by said material as said material advances between said vertical positions.

5. An apparatus as claimed in claim 1 wherein both said first and second surfaces are flexible pressure deformable surfaces with at least one of said surfaces being suspended in an opposed -3246072 relationship to define a spaced-apart area between said surfaces to receive a packaged commodity.

6. An apparatus as claimed in claim 1,2 or 3, wherein said apparatus includes means for creating a partial vacuum in said commodity receiving area between said first and second surfaces and operating in conjunction with said means for applying pressure exteriorly of said second surface.

7. An apparatus as claimed in claim 1 or 6, wherein said surfaces are enclosed and suspended relative to each other in a housing, a pressurizable chamber behind each surface, and means for pressurizing each chamber to cause said surfaces to deform towards each ether initially in said commodity receiving area.

8. An apparatus for wrapping and vacuum packaging a commodity as defined in claim 1, 2 or 3, including means for suspending said pressure deformable surface in a spaced-apart relationship to the other surface, and means for creating at least a partial vacuum in said commodity receiving area to deform said pressure deformable surface.

9. An apparatus as claimed in claim 3 having means for transporting an enveloped commodity between said wrapping assembly and said vacuum packaging assembly.

10. An apparatus as claimed in claim 3, wherein said wrapping means and said vacuum packaging means are located at spaced-apart stations, said transport device being adpated to engage and control a packaged commodity between wrapping and vacuum packaging assemblies, said transport device comprising guide means between said wrapping and said vacuum packaging assemblies, a pair of opposed gripping means movably mounted on said guide means and adapted to engage opposed wall sections of a package at said second position, means for advancing said spaced-apart gripping means between said wrapping and said vacuum -33β, 0 Ο 7 2 packaging assemblies, and means for reciprocating gripping means into and out of package-engaging and package-releasing positions at said first and second stations whereby said gripping means is adapted to engage a package at said wrapping assembly and disengage 5 from said package at said vacuum packaging assembly.

11. An apparatus as claimed in claim 2 wherein at least one of said surfaces is mounted in a movable housing and wherein said vacuum packaging includes means for bringing said housing into and out of sealing engagement with the other of said surfaces by advancing said 10 housing into operative relationship with said other surface, said other of said surfaces being mounted in a fixed relationship to said movable surface.

12. An apparatus as claimed in claim 11 wherein said means for bringing said housing into sealing engagement comprises means for 15 pivoting said housing ahout a fixed point.

13. An apparatus as claimed in claim 2 including a conditioning apparatus suitable for conditioning a fibrous material having an elongaged chamber with a treatment zone and stabilizing zone, said chamber being enclosed in said zone with said zones being in 20 communication with each other, said chamber having a loading and receiving port in communication with said treatment zone for receiving a commodity to be conditioned, and a discharge port for discharging a conditioned commodity, said discharge port being in communication with said stabilizing zone, conveying means in said 25 chamber for receiving a commodity at said loading and receiving port and for transporting said commodity between said loading and receiving ports to said treatment and stabilizing zones and to said discharge port, means for providing a source of conditioning air, means for introducing a flow of said conditioning air into said -344 6 0 7 2 treatment zone, means for introducing a flow of said air into said stabilizing zone, and means for removing from said treatment and said stabilizing zone spent conditioning air.

14. An apparatus as claimed in claim 13 wherein there is included a retention chamber associated with said discharge port whereby conditioned garments may be retained in said retention chamber after being discharged from said conveying means.

15. An apparatus as claimed in claim 13 wherein said means for providing a source of conditioning air provides a mixture of ambient air and conditioned air.

16. An apparatus as claimed in claim 2 including a mounting and suspending device suitable for mounting and suspending a commodity to be wrapped or packaged with said device adapted to be partially sealed into and form a portion of a wrapped packaged commodity, said device comprising a body portion for mounting or suspending a commodity, and a hook portion for suspending the wrapped packaged commodity from a carrier or the like and a thin, flexible heat sealable ligament connecting said body portion and said hook portion.

17. An apparatus as claimed in claim 16 in which said mounting and suspending device has a hanger-shaped body portion which is adapted to retain a garment such as a coat or the like, said ligament being connected to said body portion at one end thereof and to said hook portion at the other end thereof.

18. An apparatus as claimed in claim 16 wherein said body portion in the mounting and suspending device comprises a hangersnaped body portion adapted to retain a garment such as a coat or the a like,/hook extending from said body portion, a ligament connected to said hock at one end thereof and a hook connected to the other end of said ligament. -354 6 0 7 2

19. An apparatus as claimed in claim 16 wherein said ligament in said mounting and suspending device comprises an endless ligament secured at one end thereof to said hanger shaped body portion and secured at the other end thereof to said hook portion.

20. A method of vertically wrapping and subsequently vacuum packaging of a commodity in a flexible airtight package by an apparatus as claimed in any preceding claim comprising the steps of supplying a length of flexible air impermeable wrapping material, vertically advancing said material in a predetermined fixed path from a first vertical station to a second vertical station, vertically positioning a commodity to be wrapped in the direction of vertical advancement of said material between said first and second vertical stations and in said fixed path, vertically enveloping said commodity with said material as said material advances from said first vertical station to said . second vertical station to enclose said commodity within said material, and subjecting said enveloped commodity to a vacuum packaging step in which said commodity is initially compressed centrally and thereafter progressively outwardly.

21. A method as defined in claim 20 wherein said commodity has been subjected to a conditioning step prior to enveloping in said wrapping material.

22. An apparatus for wrapping and vacuum packaging a commodity as claimed in claim 1 and substantially as hereinbefore described with reference tc the accompanying drawings.