Abstract: A cartridge loading apparatus is provided with a pair of locking devices for locking a cartridge received in a housing of the apparatus under a prescribed force. Each locking device includes a locking lever which is rotatable between a release position where the cartridge is set freely movable and a locking position where the locking lever engages a recess formed on each lateral side face of the cartridge, a reverse insertion prevention lever rotatable about the same shaft as the rotating shaft of the locking lever, a first spring for biasing the locking lever and the reverse insertion prevention lever to come close to each other, and a second spring for biasing the locking lever to the release position while the locking lever and reverse insertion prevention lever are biased to come close to each other. The locking lever is biased by the first spring from the release position to the locking position upon engagement between the reverse insertion prevention lever and the cartridge inserted in the housing.

Abstract: Tray (1) for receiving and retaining a rigid circular information disc (4) can be inserted into a storage cassette (28) and comprises a recess (3) and retaining means (7, 15, 16) for retaining the information disc (4) in the recess (3). The tray (1), which constitutes an easy-to-remove and easy-to-introduce insert for the storage cassette, is constructed as a drawer-type insert for a playing apparatus. The retaining means (7, 15, 16), which include one resilient retaining means (7), are arranged opposite one another on the edge of the recess (3).

Abstract: An anti-theft device for restricting unauthorized removal of an article such as a CD audio disc from a cartridge having a mounting stud resiliently engaging a central opening in the article when it is positioned in the cartridge. The device includes a locking plate, a lock spring and a lock gear for locking the article between the plate and cartridge. The locking plate has a plurality of holes therethrough arranged in a pre-selected pattern, and a release tool having a similarly disposed plurality of pins which when inserted through the holes actuates the lock spring allowing the plate to be removed and the article taken from the cartridge.

Abstract: A register for maintaining documentation and a description of such documentation, particularly for maintaining photographs of items of property along with a description of the items included in the photographs. The register includes a loose-leaf binder, with a loose-leaf page having one section for containing an inventory record which is hinged to a second section for containing photographs. The inventory section is normally folded upon and facing the photographic section, with the inventory record facing the photographs. An edge of the photographic section perpendicular to the hinge is retained by the loose-leaf binder, and the inventory section is configured with respect to the photographic section such that when the folded page is retained by the binder the inventory section may be unfolded away from the photographic section along the hinge.

Abstract: A storage container or the like including a drawer-like receptacle and a pair of opposed, separable shell-like cover members for releasably supporting the drawer-like receptacle therewithin, each shell-like cover member presenting a mating edge formation to the other shell-like cover member with the mating edge formations including a recessed portion therein of a configuration and perimetral extent to define an access opening therebetween for passing the drawer-like receptacle therethrough, the shell-like cover members presenting means extending inwardly of the access opening for guiding the receptacle under displacement through the access opening and into substantially full registration within the opposed pair of shell-like cover members, and means for releasably securing the shell-like cover members together including a hinge and releasable clasp so arranged such that the shell-like cover members upon release of the clasp swing about the hinge to separate the edge formations and expose the receptacle, and s

Abstract: A magnetic recording disk cartridge is provided with a liner on the inner surface thereof. The liner is formed of unwoven fabric of a textile blend of rayon and polyester, for instance, and is kept in contact with the recording surface of the recording disk under a light pressure to remove dust on the recording surface while the recording disk is rotated. At least a part of the inner part of the liner in contact with the inner part of the recording region of the recording disk is thicker than the outer part in contact with the outer part of the recording region.

Abstract: An article of manufacture comprising a compact disc and convertible package therefor is disclosed. The device comprises a blank divided into four panel members by cruciform pairs of parallel intersecting fold lines. A flap portion is formed adjacent a surface of at least one of said panels and the compact disc is received between the flap and panel. In the merchandizing mode, a stiffener member is interposed between the leaves formed by double height panels, the components being held together by an encompassing film which is preferably transparent. The device may be converted to the storage mode by removing the film, discarding the stiffener member, and folding the panels about the cruciform fold lines to provide a structure in which the disc is encompassed between four thicknesses of material.

Abstract: A disc case is constructed for receiving a disc on which information data are recorded and for supporting the disc rotatably in the disc case. The disc case can be set into a reproducing apparatus with the disc received in the disc case. The disc case receives the disc releasably. When set into the reproducing apparatus, while the disc case is fixed in position within the reproducing apparatus, the disc is driven in rotation and thus the information data are reproduced by the reproducing apparatus. The disc case comprises a disc case carrying mechanism for carrying the disc case in cooperation with the reproducing apparatus so as to be loaded or unloaded to the reproducing apparatus.

Abstract: A device is provided for opening and closing a shutter member of a disk cartridge containing a disk in a cartridge housing and adapted for insertion into a signal recording and/or reproducing apparatus that uses the disk as a magnetic recording medium. The cartridge housing has signal read and write apertures in its upper and lower walls. The shutter member is mounted so as to partially cover a front wall and the upper wall and lower wall of the cartridge housing for opening and closing the apertures, and has an engaging opening exposing the front and lower walls. The device includes a pair of opening and closing elements mounted on the signal recording and/or reproducing apparatus so as to be in the path of insertion of the disk cartridge. The elements are provided with engaging portions adapted for selectively engaging in the engaging opening of the shutter member and for being rotated when thrust by the disk cartridge.

Abstract: A protector/holder for a computer, video or phonograph disk. The protector/holder is in the form of a housing having spaced top and bottom wall surfaces, two opposed side walls and an enclosed bottom edge forming a three sided closed enclosure with an open top end. The spaced edges of the top and bottom wall surfaces at the open top end are formed with inwardly tapering surfaces. The bottom wall surface extends a short distance beyond the length of the outer edge of the top wall surface. A pair of aligned slots are formed centrally within the top and bottom wall surfaces adjacent the open edges to provide access to the disk contained within the housing. An outwardly tapering notch is formed interiorally within the housing at the bottom end of the housing to securely receive the bottom edge therein.

Abstract: In a disk cartridge, wherein a disk is accommodated in a cartridge, a first rack and a second rack are so provided as to be movable along respective sides of the cartridge, which are perpendicular to each other, a transmission mechanism links the first rack with the second rack, a shutter is secured to the second rack, and at least recording head or reproducing head insertion openings of the cartridge are opened and closed by the shutter as the second rack is moved by the first rack, the transmission mechanism comprises an eccentric pin provided on a first pinion meshed with the first rack, a second pinion meshed with a third rack fixed to the cartridge and the second rack, and a rod connecting the eccentric pin with the shaft of the second pinion, so that the stroke of the shutter can be made much larger without changing the stroke of the first rack or the size of the cartridge.

Abstract: A retention device for floppy disk pack is disclosed. This device comprises a substrate which is provided with respective upper and lower retention means for retaining and supporting the upper and lower ends of a floppy disk pack, respectively, in such way that the tongue portion of the upper end of floppy disk pack is just fully inserted into the upper retention means by the guidance of the opposite slant edges of a tongue portion on the upper retention means so as to receive the tongue portion on the upper retention means completely within the floppy disk pack and to leave the opening of the pack outside.

Abstract: A holder for use in the filling, in a manner which permits easy retrieval, of flat recording media such as floppy disks for use in computers. The holder comprises a sandwich which includes a recess defining intermediate sheet positioned between cover and bottom sheets, the intermediate sheet being formed by a deep-drawing process so as to have side walls which extend generally transverse to the plane of the sheet. Pockets for holding disks are formed between the cover and intermediate sheets by the side walls.

Abstract: A container for use in the mailing of flat recording media, discettes having computer programs or the like recorded thereon for example, comprises a pair of cover members which cooperate to define a pocket therebetween, at least two parts of these cover members being relatively movable with respect to each other to open and close the container. The relatively movable cover parts are provided with receivers for closure elements, the closure elements and the cover member receivers being designed such that once the container has been closed and the closure elements inserted the container may not be re-opened without destruction of the closure elements.

Abstract: A protective envelope for magnetic disks and their jackets includes at least one internal partition extending from one margin and terminating short of the other.

Abstract: The package of the present invention is comprised of a unitary blank which forms a folder for carrying a computer disk having a program or series of programs recorded on it and an instruction book relating to that program or series of programs. The folder has a closed pocket in its rear portion which encapsulates the disk and prevents it from being removed from the folder without cutting a slot in the folder or destroying it. The front portion of the folder has an open pocket which receives the cover of the instruction book and has openings in it which overlie identifying indicia printed on the cover of the book so that the indicia can be seen through the folder. Thus the same folder can be used to package disks embodying a wide variety of programs.

Abstract: A software package comprises a folded structure including a pair of molded, complemental sheets connected to a hinged base. The sheets have peripheral, complemental stair-step edges for closing the package with complemental, releasable latches. The software is sealed between one of the molded sheets and the base with access thereto being provided by way of a frangible flap, while the related information is either sealed behind the other molded sheet or is at least partially behind the other molded sheet and secured to the base. Both molded sheets are preferably constructed of a clear material for easy viewing by a perspective customer.

Abstract: A disc package for enclosing a record disc and which is capable of opening to permit the disc to be withdrawn therefrom for insertion into a disc player comprises a body for accommodating the record disc, a cover, and a cover hinge pivotably connecting the cover to the body. The body comprises a first part adjacent to the cover hinge, a second part spaced away from the cover hinge, and a body hinge pivotably connecting the first and second body parts. A central holding member formed on the first body part is engageable within a center hole formed in the disc when the package is closed around the disc. A peripheral holding member is formed on a side of the second body part remote from the body hinge for gripping the outer edge of the disc.

Abstract: A digital audio disk enclosure is disclosed, having a semi-rigid generally rectangular top and bottom portions, with sided disposed about the periphery of the top and bottom portions to form an enclosed space therebetween. An elongated aperature is disposed through one side, of a size sufficient to pass a digital audio disk therethrough. Guide means are disposed within the enclosed space in aligned spaced relation substantially along the aperature side and one adjoining side. A flexible closure strip is disposed within the guide means, with a tab disposed near one end of the closure strip, suitable to be manually biased between open and closed positions. Ribs, inclined ramps, or guide means extending above top portion and below bottom portion are disclosed for ease of removing the digital audio disk from the enclosure. The digital audio disk enclosure is preferably sized to receive a pamphlet and a digital audio disk within the enclosed space.

Abstract: A recording disc enclosure is disclosed, having semi-rigid top and bottom portions, with adjoining sides forming an enclosed space therebetween. An aperature sized to pass a recording disc therethrough is disposed through one side of the enclosure. A closure strip is disposed to cover the aperature in the closed position, and to be manually biased along a top and bottom guide path to extend substantially beyond the profile of the enclosure in the open position. The closure strip, when in the open position may be biased to rotate approximately 90 degrees to an open position in alignment with one of the sides adjoining the aperture side. Top or bottom portions of the enclosure may be transparent to provide a visual indication of the contents of the enclosure. Alternately visual symbols may be disposed upon the top or bottom portion of the enclosure, and preferably upon at least one side, to provide identification of the contents of the enclosure.

Abstract: An antitheft container for a compact digital, audio disc, including: a fold-over album having an outer flat sheet of die cut, thin, soft PVC material, an inner shell of thin, rigid vaccum formed PVC material with first and second square portions each having a rib formed therein for engagement with one another when the album is folded over and a middle insert of advertising literature sealed between the inner shell and the outer sheet; and a fold-over protector member having a vacuum-formed clear rigid PVC shell, also with a rib formed thereon, an extending flap and a hinge therebetween for folding the protector member. The front of the protector member temporarily engages the first portion of the inner shell via the complementary ribs, whereas the flap of the protector member folds over the outer sheet of the album.

Abstract: A folding insert for forming a jacket to be used for a device to form a envelope-shape jacket for a magnetic cartridge. The folding insert is provided with protrusions and grooves along both side edges thereof, whereby flaps of the jacket material can be bent more than 180.degree. by a folding bar along the protrusions of the folding insert.

Abstract: A device allowing improved means for protection of magnetic data storage media from over-writing or erasure includes an envelope of such size so as to allow a tight fit of such envelope over the subject storage media and to allow the magnetic data storage media with the protective envelope to slide easily into a device used for reading or writing information from or to the storage media. When the user desires to write information to the storage media, the envelope is removed from the storage media in order to uncover the "write protect notch" on the storage media. If the user desires to protect the storage media against possible erasure or over-writing, the envelope is placed on the storage media so as to cover the write protect notch.

Abstract: A disc cassette for use in a recording and/or reproducing apparatus includes a jacket having two opposed, spaced-apart panel walls between which a record disc is rotatable. The panel walls have openings adjacent one side of the jacket to define a window through which the disc may be exposed, and a shutter is moveable on the jacket between open and closed positions in respect to the window. A latch in the jacket is disposed between the panel walls and is yieldably urged outwardly in the gap, and a keeper on the shutter is engageable with the latch at the closed position of the shutter for locking the shutter in its closed position. The shutter has an opening in its outer surface at which the shutter is engageable for movement to its closed position.

Abstract: A miniature flexible magnetic disk assembly having integrally formed motion limit stop projections along the length dimension of the disk assembly enclosure. The projections are formed from either side of the facing major wall portions of the enclosure by intruding a first and second pair of opposed major wall portion projections inwardly of the enclosure. Each projection has a concave outer surface, a convex inner surface and an abutment edge extending into the interior of the enclosure from each end of a progressive cut formed through the major wall portion a sufficient distance to provide an abutment edge forming an interference obstacle to the outer edge of the contained flexible disk.

Abstract: A flexible disc cassette is provided with a shutter which is capable of opening/closing a head access hole and a pad insertion hole respectively formed in upper and lower halves thereof. A V-shaped torsion spring is used as the spring for biasing the shutter in the closed position. The lengths of the linear arm portions integrally formed with both sides of the coiled portion of the spring are approximately the same. Both tips of the arm portions are bent at approximately 90.degree. so as to form the L-shaped hooks which has the same length and which extend in the opposite directions along the height of the coiled portion. The L-shaped hooks are stopped by the shutter and the cassette case.

Abstract: This invention provides a portable carrying case for circular sawblades useful for packaging display and permanent storage of the blade by the end user. The case is inexpensively formed from a single sheet of plastic to form therein two hinge lines defining a pair of cover panels separated by a base panel, forming a booklike casing for storing the sawblades on a stub extending inwardly from one cover panel. A plastic manually deformable latch locks the two covers closed in place over the sawblades, until access is desired. A carrying handle extends from one cover edge for transport while the cover panels are latched in closed position.

Abstract: A carrier or storage enclosure for holding recorded message and printed message mediums is disclosed herein having an elongated backing sheet of material and a pair of front sheets secured to the backing sheet along the common exterior peripheral edges thereof leaving the opposing interior edges of the front sheets open and available for insertably receiving the message carrying mediums. A storage pouch is carried on a selected one of the front sheets for holding a messge on a magnetic tape medium. At least the front sheets are composed of transparent material exposing printed display labels or messages carried on the inserted mediums so that the labels or messages are available to the viewer for reading without the necessity of message medium removal.

Abstract: A mini disk holder has a first and second thermoplastic sheet sealed at the periphery thereof for providing a pocket between the sheets. A slit is provided in one of the sheets to permit a mini disk to be inserted into the holder. The slit sheet is adhesively secured to a panel in order to seal the slit and prevent further access to the disk. The other of the sheets includes a thinned groove line providing a weakened area which may be removed therefrom in order to provide an opening to permit access to the article.

Abstract: A display/storage package for flat articles such as computer software discs, and a file for one or more display/storage packages. The display/storage package includes a bottom portion, a top portion complementary to the bottom portion, which, when engaged to constitute a closed package, form an internal compartment. The top and bottom portions are provided with corner assistance to aid in opening the package when closed. A hinge connects the top and bottom portions along one edge thereof and includes a longitudinal channel forming a guideway for a strip bearing indicia identifying the contents of the package. The file comprises a housing and a liner for the housing, with the liner including at least one pair of opposed grooves shaped to guide and retain the display/storage package within the file.

Abstract: A kind of diskette case includes left and right case bodies. A flange is set on the periphery of the interior side of each case body. A cylinder is set on the center of each case body. By means of the sturdy structure of periphery flange and cylinders this case can protect diskette held therein from being damaged by outside physical changes, dust, dirt, moisture, sunlight etc. An elastic tongue plate with semi-circular opening on its center of edge of upper side is connected to the lower side of the right case body to allow diskette can be pulled out from and put into the case with fingers very easily after opening the case. Meanwhile a label used to fill out diskettes number and name is provided to stick on case's back for easy-finding.

Abstract: A disk jacket is disclosed, the jacket having an outer envelope and an inner liner and being closed around three edges and opening outwardly along a top edge. A pair of outwardly curved elastic plates are secured between the outer envelope and the inner liner along opposite sides of the opening to cause the top edges of the opposed side walls of the jacket to be concave, whereby the mouth of the jacket is normally open. An interlocking latching mechanism is placed in the middle of the jacket opening to permit the jacket to be closed, and a covering, or lid, material is secured to the inner surface of the jacket liner along the upper edge thereof, the covering material being substantially the same thickness of a disk so as effectively to seal the opening of the jacket when it is secured in the closed position by the interlocking latch mechanism.

Abstract: A video disc sleeve comprises a U-shaped enclosure, and a pair of T-shaped side rails which are ultrasonically welded to the enclosure to form the package. The inside surfaces of the T-rails are inclined away from the respective intermediate flange portions to accommodate excess molten plastic during welding to produce clean and uniform welds.

Abstract: A record package includes a disc record housed within an enclosure. The enclosure comprises thin membrane covers held in tension between a metallic outer frame and two inner rings. The inner rings include dust seals which are held against the disc record by the tension of the membranes. When the disc record rotates, the windage it creates lifts the dust seals from the disc record. The use of a clear membrane eliminates the need for a sight window when recording on the playing back from an optical disc record.

Abstract: The invention provides a case for housing information memory media therein, having a base sheet which is integrally constituted by a first case section, a second case section and a third case section through a first connecting portion and a second connecting portion. The first and second connecting portions which are included in the third case section can be folded. When the base sheet is folded so that the first and second case sections oppose each other, a space is formed to contain the main formation memory medium therein. A flexible polyvinyl chloride sheet which forms a pocket is adhered on the first case section 14. The flexible polyvinyl chloride sheet is located on a surface of the base sheet which opposes a surface at which the space is formed to house the main information memory medium therein. A hole is formed near an opening of the pocket to extend through the flexible polyvinyl chloride sheet.

Abstract: A magnetic disk jacket which encloses and protects a magnetic disk is rendered duplication resistant by hot-stamp transfer printing an area of the jacket which cannot be supported in a flat or planar condition against the application of pressure after the jacket has been at least partially assembled, hot-stamp transfer printing an area of the jacket which extends across a portion of the jacket which is to be folded at assembly, or embossing an area of the jacket which will be superposed over a panel of the partially assembled disk jacket. The printed or embossed area may also identify information which should be present on the disk.

Abstract: A disc accommodating case comprises a jacket having an opening at one end thereof for accommodating a disc recorded with an information signal within an internal space, and a lid member for closing the opening of the jacket accommodating the disc. The lid member comprises a lid main body which fits within the opening of said jacket; a pair of engaging fingers provided on the right and left sides of the lid main body, for engaging with corresponding depressions formed at the inner part of said jacket; and metal leaf spring arm members respectively fixed to the lid main body and supporting the engaging finger at a tip end thereof. The metal leaf spring members are capable of being bent resiliently along the width direction of the lid member.

Abstract: A protective envelope for a disk cartridge assembly including a disk for storage of information signals thereon and a jacket for housing said disk has a rear wall, a front wall and a cover. Each of the rear and front walls has corresponding bottom and opposite side edges joined together and unjoined top edges which form a pocket having an opening on one side thereof and dimensioned to receive at least a portion of the disk cartridge. The cover is pivotally joined to the top edge of the rear wall and is capable of pivoting between an open position to allow removal of the disk cartridge from the pocket and a closed position to enclose the entire disk cartridge within the envelope. The rear wall may be extended above the top edge of the front wall to facilitate removal of the disk cartridge from the pocket, in which case the cover, when in a closed position, extends below the top edge of the front wall.

Abstract: Apparatus for the manufacture of a video disc caddy sleeve comprising folding platens, an intermediate spacer plate with indentations on the leading edge, and a selective heating means. Spacer plate causes plastic sheet to bend in the middle while folding platens close to a folded up position. Indentations on the leading edge act to keep label, already adhered to plastic sheet, from tearing while sheet is being bent into a U-shaped enclosure.

Abstract: The video disc caddy comprises a record retaining spine removably received inside an outer protective cover. The spine has an opening for receiving a disc record. Each side of the spine is provided with a pair of oppositely disposed, substantially semicircular wiping pads around the record receiving opening therein.

Abstract: A case for accommodating a rotary recording medium comprises a jacket having an opening at one end, for accommodating a rotary recording medium within an internal space provided therein, and a detachable lid member for closing the front end opening of the jacket accommodating the rotary recording medium. The jacket consists of a flat and hollow jacket main body having openings at front and rear ends thereof and unitarily having upper and lower sheet parts and right and left side walls, and a rear lid fixed to and closing the rear end opening of the jacket main body.

Abstract: A method for cold-forming light gauge polymer sheet material by application of localized heat to the area of the fold. In the manufacture of Lexan polycarbonate flexible magnetic disk jackets, heat is applied to the folded edge by a heating element generally maintained uniformly at 375.degree. F. The heating element contacts the folded Lexan polycarbonate edge in a U-shaped trough having planar sidewalls generally perpendicular to a planar bottom wall.

Abstract: An information-disc cartridge containing a disc within an enclosure, which has two major walls on opposite sides of the disc and a peripheral wall. Each of the two major walls has an opening so as to permit a disc drive to engage the disc. On each side of said disc, information can be recorded and/or reproduced via the openings in the major walls. The openings are closed by a single closing member which simultaneously closes both openings in the major walls. The closing member which is bodily removable in a radial direction and comprises a portion of each of the major walls of the disc enclosure and a portion of the peripheral wall between the two portions of the major walls.

Abstract: A disc cartridge for containing therein an information recording disc, such as a video disc, has a detachable lid which is engaged with an opening of said cartridge. The lid has a pair of engaging means which are integrally formed with the lid body by a synthetic resin. Each of the engaging means comprises a curved lock arm having a projection to be received in a recess made in a cartridge body, and is connected to the end of the lid body at its one end. A plurality of leaf spring elements constitute a zigzag-shaped spring member which is interposed between one end of the lid body and the lock arm. Some of the leaf spring elements have thin and thick portions so that stress applied thereto will be dispersed. In one embodiment, the dimension of the thick portions is selected so that the thick portion abuts against an adjacent leaf spring when the zigzag-shaped spring member is compressed.

Abstract: A protective cartridge is provided for a disc record used in an optical playback system. The protective cartridge is provided with finger members to suspend the disc record in the cavity of the cartridge so that the information bearing surfaces of the disc record do not touch the inside surfaces of the cartridge. When the record package is in storage, the finger members are biased to engage the outside rim of the disc record. Tapered pins provided on the optical player disengage the finger members to permit the disc record to rotate in the optical player.

Abstract: There is disclosed a security seal apparatus for securing information recorded on a recording medium such as a floppy disc or recording tape which incorporates an aperture therein. The security seal apparatus includes a circular rigid pad projecting beyond the edges of such aperture and formed centrally with a post for projecting through such aperture. The post is formed on its free extremity with an enlarged-in-diameter conical lock head having its base of a cross-section less than the cross-section of the aperture. A fastener plate is provided with a central opening having a diameter slightly less than the base of such conical lock head so that such fastener plate may be pressed onto such lock head causing the base of the conical lock to be compressed radially inwardly whereby the lock will pass through such opening and expand radially outwardly to overlie the peripheral edges of such opening and lock the fastener in position.

Abstract: A felt mat having a pictorial image on the fibers thereof, which image is formed from sublimating disperse dyes. An X-cut is formed in the center of the mat to enable the mat to be placed on a phonograph turntable, with the spindle passing through the X-cut. As optional features, the mat is coated with an antistatic agent and has strobe markings on the surface thereof. The strobe markings are also formed from sublimating disperse dyes. The mat can be sold separately or can be packaged with a phonograph record. If packaged with the phonograph record, the mat will be visible in the package, and can contain a photograph of the recording artist and his name or the title of the record or album.

Abstract: A case for enclosing a phonograph record, including a circular ring in which the record snap fits, and a circular cover adjacent each side of the record, the covers being hinged to the ring.

Abstract: Grammophone record sleeve made of thin material as paper or cardboard and comprising a first section and a second section (13), which sections are connected to each other and intended to store the record (9) in between them and have such a size and shape that they substantially cover the same. The sleeve is made of a material which surface is electrically conducting at least on the substantially part of the surfaces which by the storing of the grammophone record (9) in the sleeve will be in contact with the sides thereof and on at least one surface of contact (8) which is so positioned that it presumably will get in contact with the hand of a person handling the sleeve for the insertion and extraction of the grammophone record whereby said inner surface or surfaces are in electrically leading connection with the surface or surfaces of contact.

Abstract: An envelope is provided, formed from a single sheet of paper material, which is substantially rectangular in configuration permitting processing on automatic equipment. The envelope is adapted for use with generally circular charts and includes a rectangular locking flap which in cooperation with the dimensions of the envelope minimizes the chance of slippage and damage to the charts.