Abstract: A tape roll structure which includes a tape having adhesive on one face, and the tape can be pulled off a tape roll and cut into segments of varying lengths. The tape is provided with a paper tape or coating on one or both sides for receiving written indicia, and which becomes part of a tape segment. Thus, once a tape segment has been attached by adhesive to a marginal edge of a sheet, written indicia can be written on the paper tape or coating so that a tab is immediately formed on a sheet. In a preferred embodiment, a pair of tape rolls are mounted in a shell, and one of the tape rolls carries a paper tape and the other tape roll carries adhesive tape. When the two tapes are pulled from their rolls, the paper tape moves into bonded engagement with one-half of the adhesive tape of the other roll. Then the tapes are cut into a segment and bonded to the sheet to which a tab is to be mounted.

Abstract: The present invention provides a clamshell container for storing and dispensing rolls of labels. The container has a top portion hinged along one edge to a bottom portion and a generally cylindrical shape with flanges extending along a longitudinal center plane. The bottom portion has transverse partitions providing semi-cylindrical compartments between the partitions, each compartment receiving a roll of labels. The flanges of the top and bottom portions on the ends and back have a channel, the channel comprising a U-shaped projection from the top portion which is received by a mating U-shaped recess in the bottom portion for a snap-fit, interlocking engagement of the top portion to the bottom portion. The top and bottom flanges on the front have a button for interlocking engagement of the top and bottom portions further ensuring that the container does not come open inadvertently.

Abstract: Hot melt thermoplastic adhesive is predeposited on a carrier strip having front and back release surfaces. The carrier strip is rolled into a coil compressing the thermoplastic hot melt into disks which may later be removed for use. The disks are spaced so that the carrier strip may be deformed to expose a single disk to a planar surface permitting simplified dispensing of the disks.

Abstract: A sterilizable package for medical instruments includes bonded first and second sheets of microbe impervious material at least one of which is sufficiently porous to allow the passage of gas therethrough. The first sheet has a flap which is folded over to seal the opening of the pouch. An adhesive sealing tape is bonded to the flap. The sealing tape includes a carrier strip, a first adhesive layer formed from heat seal adhesive and disposed on one side of the carrier strip, and a second adhesive layer formed from pressure sensitive adhesive disposed on an opposite side of the carrier strip. The first adhesive layer forms a heat seal bond between the carrier strip and the first sheet. The sterilizable pouch is resistant to tunneling or rippling of the package material which sometimes occurs during the sterilization process.

Abstract: The invention relates to a hand-held implement for transferring a film (25) from a backing strip (7) wound on a supply real (5) onto a substrate, the said implement having a housing (2), a pressure-exerting part (16) projecting therefrom, and two bearing and/or carrier devices for the supply reel (5) and a take-up real (6) for the backing strip (7) guided around the pressure-exerting part (16), the housing being able to be opened for the purposes of replacing the reels (5,6).

Abstract: A one-piece edge protector for a roll of tape is described. The protector has a pair of sides and transverse, peripheral bridge portion which may receive a leading portion of a roll of tape to assist in dispensing the tape. The protector is particularly suitable to protect a roll of hand tearable medical tape.

Abstract: The present invention relates to gradually applying a slippery agent to resin impregnated cloth for generating a gradient of slippery agent on the cloth whereby the outward most exposed portions of the cloth wound on a pipe have the highest concentration of slippery agent and the concentration of slippery agent decreases with the depth of the cloth wound around the pipe.

Abstract: A wrapped package carries a transparent overwrap material and a tear tape attached to the overwrap material for effecting tearing of the overwrap material. The tear tape has a layer of adhesive on one side of the tape substrate for adhesion to the overwrap material and a layer of ink arranged to provide visible markings for the tear tape. The ink is applied on the side of the adhesive which is remote from the tape so that when the tear tape is attached to the overwrap material by the adhesive, the second surface of the adhesive and the layer of ink thereon are in contact with the overwrap material and the markings are visible through the transparent overwrap material without viewing through the adhesive and without viewing through the tape.

Abstract: Piece of adhesive film for a temporary bond,a) comprising a double-sided adhesive filmb) whose adhesive surfaces have been rendered non-adhesive in areas lying opposite one another in an offset manner, wherec) the non-adhesive areas only overlap slightly, or not at all, andd) the adhesive bond produced therewith can be separated by pulling apart the non-adhesive areas, in particular by pulling in the direction of the bond plane.

Abstract: There is disclosed a pressure sensitive label roll comprised of a composite label web having a carrier web and labels releasably adhered by pressure sensitive adhesive to the carrier web. The outer wrap of the label roll is adhesively secured to the inner wrap to bold the outer wrap in place until the label roll is ready to be used, and this adhesive holds the labels of the inner wrap to the carrier web of the outer wrap more weakly than the pressure sensitive adhesive holds the labels of the inner wrap to the carrier web of the inner wrap. This prevents labels from being delaminated from the inner wrap when the outer wrap is unwound by the user.

Abstract: A taping apparatus is presented for simultaneously taping opposing sides of a thin planar object around an edge of the thin planar object. The apparatus includes a tapered trough which functions as a track for advancing the tape and thin planar object through a pincher assembly which secures the tape to opposing sides of the object by applying pressure. The apparatus is designed to be hand held during use. Other embodiments of the apparatus eliminate the need to hold the apparatus during use.

Abstract: An adhesive sheeting applicator and method adapted to dispense strips of adhesive-backed sheeting from a supply roll rotatably disposed thereon and to apply said strips of sheeting to a surface with a desired spacing between successive strips by advancing the applicator a distance along the surface, the sheeting on the supply roll being in successive cut strips applied to a continuous substrate liner.

Abstract: Adhesive film strip for an adhesive bond which can be separated again by pulling on the strip in the direction of the bond plane, character in that the bond area decreases at one end of the adhesive film strip, while the other end serves as tab for pulling.

Abstract: A packaging coding system including at least one roll of moisture-activated adhesive-backed tape with a top side and an underside and two lateral edges, and a layer of moisture-activated adhesive applied to the underside of the tape. The tape has oil absorbed into one or both lateral edges to provide flexibility, waterproofing, and a vapor barrier to prevent activation of the adhesive when the tape is rolled up and at least one colored ink applied to at least one edge of the tape in a predetermined discrete position which serves to code the tape.

Abstract: A tape dispensing apparatus including a tape container having tape dispensing apertures and a plurality of slots for partitions between rolls of tape. The partitions in the slots are individually formed from portions of boxes for the tapes. The portions of the boxes are integral with the boxes with the tapes therein but have lines of demarcation from the remainders of the boxes for being torn therefrom.

Abstract: Use of a strip of an adhesive film for a re-releasable adhesive bond based on thermoplastic elastomer and tackifying resins, the adhesive film having high elasticity and low plasticity and the adhesion being lower than the cohesion, the adhesive strength largely disappearing during extension of the film, the ratio of peel strength to tear strength being at least 1:1.5, and an adhesive bond produced therewith being releasable by pulling on the adhesive film in the direction of the plane of adhesion, one end of the strip being provided on both sides with a UV-opaque covering which at the same time serves as a tab for pulling.

Abstract: A tape provides a supply of doubly adhesively faced pads for individual application to a receiving surface. The tape comprises a generally elongate flexible base layer of material having one side with a first release surface, and a plurality of pads of material carried on the first release surface of the base layer arranged in succession along the length of the base layer. Each of the pads has first and second tacky faces facing in opposite directions and has the first of its tacky faces releasably adhered to the first release surface of the base layer. The base layer of material has a second side facing oppositely to the first side and has a second release surface, so that the base layer may be rolled up to bring the second release surface thereof into engagement with the second tacky faces of the pads.

Abstract: A ceremonial roll of material that can be easily unrolled and used is described. The roll contains a small layer or strip of releasable adhesive located on the floor surface of the roll within a starting end region of the roll. This adhesive is then pressed onto the floor itself before the roll is rolled down the aisle or walkway to be used. The adhesive will hold to the floor during the unrolling but can easily be removed by pulling up at an angle from the floor. The ceremonial roll may be made from a host of materials but a non-woven material made from long, natural and synthetic fibers is preferred.

Abstract: An adhesive tape is provided which is obtained starting from a roll of composite material consisting of a first continuous strip or tape of film material and a second continuous strip in a material having low adherence to adhesives, such as a siliconized continuous backing strip, the film material being a high-strength polymeric material film having adhered to one face thereof at least one extremely thin continuous run of adhesive obtained by applying said continuous backing strip onto said tape whereby said adhesive remains on said tape after removal of said continuous backing strip by virtue of the greater adhesion of said adhesive to said tape than to said continuous backing strip, said adhesive tape being useful for splicing continuous webs of thin films.

Abstract: A novel process and apparatus are provided for splicing together adjacent paper materials, in mid-air which includes placing adjacent paper materials together in an aligned position, pressing the papers together, applying tape by utilizing an apparatus which includes a tape spool on an axle, and roller, an inverted V channel, wheels and cant wheels for guiding and maintaining paper or plastic materials in a fixed position, and a cutter for severing tape, moving the apparatus along the adjacent paper materials and severing the tape.

Abstract: A ceremonial roll of material that can be easily unrolled and used is described. The roll contains a small layer or strip of releasable adhesive located on the floor surface of the roll at the starting end thereof. The adhesive is applied to the roll under pressure and at elevated temperatures. This adhesive is then pressed onto the floor itself before the roll is rolled down the aisle or walkway to be used. The adhesive will hold to the floor during the unrolling but can easily be removed by pulling up at an angle of greater than 30.degree. from the floor. The adhesive will resist from 10 to 300 pounds of pull at angles less than this 30.degree.. The ceremonial roll may be made from a host of materials but a non-woven material made from long, natural and synthetic fibers is preferred.

Abstract: Device for tying vines or other plants that can be trained by tying, using adhesive tape.A flat body (10), the rear portion (11) of which encloses a roll (2) of adhesive tape (20), its front part (12) housing a star-shaped wheel (3) with several spokes (30), mounted in free rotation around a transverse axis (31), with the end (32) of each of the spokes (30) being rounded and of a width that is approximately equal to the width of the adhesive tape (20). Said spokes (30) are surrounded by the side walls (34) separated by spaces (35,), with part of said star-shaped wheel (3) exceeding the length of its spokes on the lower edge (13) of the body (10), and being partially covered by a cog (4) in the arc of a circle, mounted in a pivot around an axis (40) to the front part (12) of the body (10) and held by a spring (41) against the ends (32) of the spokes (30) between the side walls (34).

Abstract: An adjustable sensor retainer and method for adjustably securing and retaining a sensor (e.g. a piezoelectric pulse sensor) against a skin region of a person includes the use of a primary retainer tape and an adjustable secondary retainer tape. The primary retainer tape is an adhesive tape to which the sensor can be attached. The adhesive primary retainer tape has strips of protective film with blind pull tabs attached thereto. This allows simplified one-handed application of the primary retainer tape while initially positioning and holding the sensor in place with the other hand. The secondary retainer tape is a tape strip removably attached to the top of the primary retainer tape and disposed over the sensor. After the initial positioning of the sensor with the primary retainer tape, the sensor can be finally positioned and the secondary retainer tape re-attached to the top of the primary retainer tape, thereby securing the sensor in the final desired location.

Abstract: A single-use tape applicator includes a pair of sidewalls spaced laterally from one another to define a tape storage enclosure, and two posts extending between the sidewalls and spaced from one another to define a generally oval-shaped run. A closed loop of backing material is supported by the posts and is movable relative to the posts along the run. The length of the loop is substantially equal to the length of the run. A piece of tape coated on one side with an adhesive material is supported and carried on the backing material. The enclosure defines an opening through which the tape is pulled from the backing material and dispensed.

Abstract: The invention provides a longitudinally extending adhesive tape product adapted to be cut off into a plurality of tape segments by use of a transverse cutting edge. The product comprises a longitudinally extending tape wound into a roll, the tape having a first side which is adhesive free, a plurality of longitudinally separated indicia and a second side which has a corresponding plurality of longitudinally separated and transversely extending coating bands of pressure sensitive adhesive. The coating bands have leading and trailing edges and are separated by portions of the second side of the tape which are substantially adhesive free. The indicia are so located relative to the coating bands whereby when one of the indicia is aligned in a specified relation to the cutting edge and a tape segment is cut off, the cut off tape segment has a single one of the coating bands and the coating band on the cut off tape segment is located adjacent a transverse edge of the tape segment.

Abstract: A dispenser for a roll of adhesive labels or other types of tape rolls employs two sidewalls hinged to a third intermediary base wall to close and create a pocket for holding the tape roll while allowing the roll to rotate for dispensing. The base wall has a face for supporting the dispenser on a desk and the tape may be dispensed through a slot formed by the interface of the two sidewalls. Interfitting embossments in the two sidewalls allow the dispenser to be opened for removing or inserting a new roll of tape. A window cut in one sidewall allows advancing or stopping the tape with finger pressure against the tape. The dispenser is advantageously produced from a single piece of plastic.

Abstract: A refillable tape dispenser comprising a housing including a side wall, and a hub having a longitudinal axis defining an axial direction. The hub has inner and outer surfaces, and a first end fixed to the side wall. The hub comprises first and second opposed flexible portions having distal ends remote from the side wall which flexible portions project axially from the side wall. The dispenser also includes a retaining lug at the distal end of each of the flexible portions. The retaining lugs have remote ends spaced axially from the flexible portions. Ribs are present at the distal end of each of the flexible portions. The ribs project radially outward of the flexible portions and have axially extending arcuate bearing surfaces. The dispenser of the present invention is particularly suitable for coupling to a backcard having chevron-shaped openings.

Abstract: A package of pressure sensitive tape having an overall size and shape so as to readily fit into the pocket of a garment such as a shirt for ease in carrying and for ready accessibility. The package comprises a relatively thin, stiff and short two-ply core and a length of pressure sensitive tape convolutely wound around the two-ply core to form a plurality of layers.

Abstract: A beak or bill shaped projection on the front end of a tape dispenser cassette is defined by a spring tongue and a pair of rigid strips on the front wall of the cassette which engage in a tape feed mechanism having at least a feed wheel engaging between the strips when the cassette is inserted into a tape dispenser.

Abstract: This invention has for its object to provide an apparatus for connecting a paper web with a paper web threading member wherein during the stand-by period of a retaining device the adhesive surface of an adhesive material in the retaining device is covered up by a movable cover so that paper dust or the like may be prevented from depositing thereon. The apparatus comprises a paper web retaining member connected to the upstream end of the paper web threading member and adapted to be located at a predetermined position along a paper web threading path where it is allowed to stand by; a retaining device for retaining a paper web, which has been advanced to the predetermined position along the path, onto the paper web retaining member through the intermediary of an adhesive material; and a movable cover provided in juxtaposition with the retaining device and adapted to be moved so as to selectively cover up or expose at least the adhesive surface of the adhesive material.

Abstract: A novel container is disclosed which can contain rolls of pressure sensitive tape of various widths and which provides for rapid and convenient dispensing of the pressure sensitive tape with the simultaneous separation of a release film from the pressure sensitive tape. The tape dispenser comprises a container a first side wall, a second side wall, a top wall, a bottom wall and a back wall. The top wall is provided with a plurality of parallel grooves. Similarly, the bottom wall is provided with a plurality of parallel grooves. The top wall's parallel groove are positioned so as to correspond in position, to the position of the top wall's parallel grooves. The top wall grooves and the bottom wall grooves are parallel to the first side wall and the second side wall. A plurality of divider walls are mounted in corresponding top and bottom wall grooves.

Abstract: An adhesive tape holder having a base and a roller plate is disclosed. An urging member having an urging plate is formed at one end of a notch formed on the roller plate. A pressing plate is disposed on the slot formed at the other end on the notch. The urging plate is in contact with the adhesive tape such that the rotation of hte adhesive tape roll mounted onto a roller will pull it the tape and cut out at a desired length.

Abstract: The present invention comprises a refillable tape dispenser comprising a housing including a side wall, and a tubular hub having a longitudinal axis defining an axial direction, and a first end fixed to the side wall. The hub comprises a continuous base portion joined to the side wall, first and second opposed arcuate guide portions, and first and second opposed arcuate flexible portions which have distal ends remote from the continuous base portion. The first and second flexible portions have axially extending side surfaces defining a non-diametrical chord for the cylindrical hub and have a retaining lug at their distal ends. The retaining lugs have a remote end spaced axially from the distal ends of the flexible portions, a first retaining surface projecting radially outward of the flexible portion, and a second retaining surface projecting radially inward of the flexible portion.

Abstract: A strip of pressure sensitive tape is laid out along top and bottom plates or top and bottom tracks of a wall that is to be constructed with studs at a fixed spacing. The tape bears stud location marks at preselected intervals for ease in locating the studs for connection to the top and bottom plates and top and bottom tracks. The tape is provided in a supply roll that is rotatably mounted in an applicator tool having a handle and a pressure roller that enable the tape to be pressed against the plate or track and withdrawn from the roll as the tool and tape are moved along. To facilitate locating and positioning of the end of the tape, and therefore of the first stud location mark of the tape, the tool is provided with a pressure foot extending from the pressure roller and has an edge which may easily be positioned at the desired starting point of the tape, as, for example, against an existing wall.

Abstract: A blank for a roll of tape is disclosed which is constructed from a blank having a fold line so that it may be folded over and glued. Each side of the blank on either side of the fold line has a U-shaped aperture extending in the same direction. The two U-shaped apertures are positioned and dimensioned whereby they are in registry. The roll of tape is mounted on the folded blank in a manner that the portions between the U-shaped apertures are inserted each from opposite sides of the blank as it is folded whereby the portions are axially located with respect to the roll of tape.

Abstract: An adhesive bandage dispensing device is provided which facilitates efficient and quick access to an adhesive bandage. The device has a base, a spool holder, a removal platform having a slicer and cutter and an adhesive bandage carrier spool mounted to the device by the spool holder. A continuous strip of adhesive bandages is mounted on the spool. The strip consists of separate adhesive bandages wrapped in a protective coating. The action of pulling the strip away from the spool over the platform causes a portion of the protective covering of strip to be sliced by the slicer. This will expose a bandage which then can be lifted off the remaining portion of the protective coating for use. After this, the cutter is used to separate the bandageless strip from the device for subsequent disposal.

Abstract: Disclosed is an apparatus for packaging a plurality of disk-shaped products, such as a roll of magnetic tape, wherein a magnetic tape is rolled up around a hub. In the apparatus, the disk-shaped products are piled up so that the hubs are aligned along the axial direction. The apparatus has a center core passing through the hubs, at least one pare of pressing plates being positioned at both ends of the piled disk-shaped products so that disk-shaped products are pressed in the axial direction between the pressing plates, and heat shrinkable sheet for fixing a positional relation between the center core and the pressing plates.

Abstract: Novel collapsible cores for adhesive tape rolls adapted to inhibit telescoping or migration of the adhesive tape off the roll after tape roll manufacture; and adhesive tape rolls prepared therefrom.

Abstract: A narrow tape of polyester or other suitable plastic for use as a tear tape in the packaging industry slit from a wide web of the material, is coated wholly on one side and preferably at the edges with a suitable release material. Downstream of the slitting the tape is printed on the other side, then coated over the printing with a suitable pressure sensitive adhesive, said coating width being narrower than the width of the tape covering the printing and spaced from both side edges of the tape to avoid pick-off onto tape guide surfaces. The tape is then wound onto a core with both radial and axial traversing movements. The tape is then supplied to the packaging line preformed with adhesive to avoid on-line adhesive applications.

Abstract: A tape holding box and dispenser in the general form of rectangular parallelepiped for holding and dispensing adhesive tape from a tubular roll. The box and dispenser comprises a receptacle made from plastic having an aligned parallel pair of front and rear walls, an aligned parallel pair of substantially rectangular side walls with an opening or hole on it and a top panel connecting corresponding segments of the upper edge of the side walls, front wall and rear wall. On each of the inner surface of the side walls, there are some bosses with small height around the hole respectively for supporting the end of the tape spool, the top panel and side walls defining an opening for dispensing tape from the roll.

Abstract: A composite adhesive closure tape comprising an assembly of sheets laminated one over the other including a central elastomeric sheet having at least one stretching axis; anchor strips disposed over the elastomeric sheet and adhered to opposite marginal end portions of the elastomeric sheet, each anchor strip having one end portion adhered to the elastomeric sheet and an unadhered end portion extending along the stretching axis in opposite directions away from the elastomeric sheet, the unadhered end portions being covered on their bottom surfaces with adhesive; a release strip underlying the elastomeric sheet, the bottom of the release strip being at least partially covered with adhesive; and an attachment sheet underlying and adhered to a portion of one of the anchor strips and underlying end adhered to the adhesive of the release strip. The composite adhesive tape may be provided in a roll or attached to the edge of a diaper.

Abstract: A thermoformed plastic package made of a single piece of formed plastic sheeting folded upon itself along a hinge band. The back and front sections form an enclosure, preferably for a tape roll, and have contacting portions which include flat areas and interlocked undercut mating areas which extend from a first position near the hinge around the enclosure to a second position near the hinge, and preferably along the hinge as well. The hinge band preferably includes a center portion narrower than the total width of two side portions therealong, and serves to draw the face-to-face sections of the package together along the hinge. A tape channel extending from the enclosure provides frictional engagement tape being dispensed.

Abstract: A pressure sensitive adhesive tape, such as a white typing correction tape, is wound up with backing tape or a liner tape wound between successive turns of the tape. The backing tape is cut into short lengths, and the correction tape is bent sharply back upon itself over a "peeling" member as it is dispensed, to separate the short lengths of the backing or liner tape and leave them behind in the carton. The space within the standard size dispenser package is adequate to hold the waste pieces of backing tape as the correction tape roll is used up. A short cutting blade may be provided to cut off desired lengths of the correction tape.

Abstract: A tape dispenser for an agricultural/industrial environment having wind and dirt dispenses tape adhesive side upwardly exposed. Centrally of the dispenser there is placed a roll of tape conventionally wound in a spiral. The roll of tape has an outwardly exposed adhesive release surface and an inwardly exposed adhesive coated surface and is wound in a first direction. In the dispenser, the tape is threaded from the first direction of its spiral wound path to a reversed path around the roll in a second and opposite direction. Typically, the reversed path is defined over the surfaces of four rollers with the adhesive release side inwardly exposed to the rollers and the adhesive coated side outwardly exposed. The roll and reverse path are encased within a housing to prevent the outwardly exposed adhesive from adhering either to ambient dust or nearby objects. The tape passes free from the housing along a dispensing path to a convention severing tape knife.

Abstract: A locking mechanism for magnetic computer tape to be used in conjunction with a closure strap or canister, the magnetic tape being wound about a central hub of a reel, the reel comprising a pair of spaced circular flanges connected at their centers to the hub; the locking mechanism comprising a flexible plastic strip having double sided adhesive pads attached to its ends, the loop being bent and joined at its adhesive ends to form a small loop; the loop being firmly attached to an interior portion of the strap or canister whereby the loop fits between the flanges and bears against the outer winding of the tape to prevent the tape from becoming unwound.

Abstract: A dispenser is provided to hold and dispense two tapes of the type which have removably interengageable surfaces. The dispenser is in the form of an elongated hollow container that about midway of its length is provided with a groove-shaped outward flaring passage that extends from a slot that is formed in the encircling wall between the two main walls. The container accommodates two spirally wound tapes, the end portions of which are interengaged and project through the slot.

Abstract: A reusable tape tab marks the exposed end of a roll of tape. The tab comprises a sheet of non-porous, moisture-resistant, adhesive-free material which is adherable to the exposed end of the tape when the tape is stored between use. The tab is removable from the end of the tape and is reusable.

Abstract: Tubular packages of glass fibers having a generally cylindrical shape are provided that have a reduced tendency to slump or to collapse as the glass fibers are removed from the package. The tubular package has glass fibers wound in superimposed annular layers to form a tubular package of continuous glass fibers having a generally cylindrical shape. The tubular, generally cylindrical shaped package of glass fibers has a fibrous net on the external surface of the package of glass fibers, wherein the net is sufficient to provide support to at least the external peripheral surface of the package of glass fibers. This support can be provided by having the net composed of stiff fibrous material that is used in conjunction with strips of adhesive on the external surface of the net, or heat shrinkable fibrous material, or fibrous material with a tacky surface, or a mixture thereof.

Abstract: A communication cable applicator and method in which a communication cable component supply including two rolls of pressure sensitive adhesive tape and a plurality of lengths of communication conductors supported and guided on a frame across a resilient applicator roller on which the conductors are sandwiched between the tapes and the composite is applied to a floor prior to carpeting as a user pushes the apparatus across the floor.

Abstract: A dispenser pack for accommodating strip or tape-like packaged material in roll form. The dispenser pack includes a bottom with integrally molded, axially parallel side walls, a removable lid which is parallel to the bottom, and an outlet or removal slot. A wall portion is molded onto the lid. This wall portion has the same length as the side walls, one of which is provided with a recess into which the wall portion, which is slightly narrower than the recess, extends asymmetrically, while leaving free the removal slot and at the same time forming a fixing gap for the packaged material.