Abstract: Magnetic recording medium including a substrate, at least one lower layer which is applied thereon and contains at least one binder and at least one inorganic pigment, and at least one upper magnetic layer which is applied to the lower layer and contains at least one magnetic pigment P2 and at least one binder and at least one further, nonmagnetic pigment P3, the binder matrix of the upper magnetic layer having a Tg of at least 50° C. and the binder matrix of the lower layer containing at least one binder having a Tg of <50° C., the further nonmagnetic pigment P3 of the upper magnetic layer having a particle size which corresponds at least to the dry thickness of the upper magnetic layer; and the upper magnetic layer containing at least one compound (A) and at least one compound (B), (A) and (B) corresponding to the following formulae R1—COO—(R3—O)m—R2  (A) R1—COO—R4  (B) and processes for their production.

Abstract: Cartridge having a housing which includes a lower cartridge part and an upper cartridge part. The lower cartridge part and the upper cartridge part are connected together. Each of the lower cartridge part and the upper cartridge part include side walls and a recess which is adapted to receive a tape guiding pin. A reel is rotatably mounted in the housing. A tape guiding pin clasp fixes the tape guiding pin in the recesses of the lower cartridge part and the upper cartridge part. The tape guiding pin is located in a region of a tape exit opening that is located in a corner of the housing. The tape exit opening is adapted to be closed by a sliding door. The tape guiding pin clasp includes a mechanism that secures at least one side wall of the lower cartridge part to at least one side wall of the upper cartridge part. The tape guiding pin clasp engages with and secures together the at least one side wall of the lower cartridge part and the at least one side wall of the upper cartridge part.

Abstract: Magnetic-tape cartridge includes a substantially rectangular housing. At least one tape reel is rotatably mounted in the housing. The at least one tape reel is configured to receive wound magnetic tape. A first part is axially movably mounted in a center of the at least one tape reel. A second part is non-rotatably mounted and axially movably mounted to a housing wall of the cartridge via a spring. The first part is movable between a resting position and an operating position in which the first part moves the second part against the biasing force of the spring.

Abstract: Hub for information media, the hub comprising an outer winding area having a width, a central bore and a center point located on the hub, driving grooves on a circumference of the hub, an outer ring, an inner ring, and a connector for connecting the outer ring with the inner ring. The width of the outer winding area of the hub is at least equal to a width of the information medium. The connector comprises diagonal ribs running diagonally at a slant in an axial direction and sloping alternately in accordance with two axial directions of the hub and in neighboring segments, wherein respective pairs of neighboring diagonal ribs are sloped in different directions and have a further rib between them.

Abstract: A tape-like magnetic medium comprising a flexible substrate and a magnetic layer thereon which comprises magnetic pigment and polymeric binder. The magnetic layer has a thickness of at least 3 &mgr;m and a specific surface porosity of at least 80 cm2/cm2. Also provided are a production process for the medium and a high-speed process for the production of a copy of a magnetic master tape.

Abstract: Magnetic recording medium including a substrate, at least one lower layer which is applied thereon and contains at least one binder and at least one inorganic pigment, and at least one upper magnetic layer which is applied to the lower layer and contains at least one magnetic pigment P2 and at least one binder and at least one further, nonmagnetic pigment P3, the binder matrix of the upper magnetic layer having a Tg of at least 50° C. and the binder matrix of the lower layer containing at least one binder having a Tg of <50° C.

Abstract: A method of and apparatus for producing a transparent film or a transparent layer with a surface structure at least on one side and, on the other side, in register with said surface structure, a structural or 2-dimensional pattern, operate with at least two rotating rollers and layer application between them and curing of a structural layer. By means of a third rotating application roller, a further layer can be applied in register to the rear side of the structural layer and can be cured. The rollers and roller nips can be set very accurately by suitable devices. The rotation of all the rollers is controlled by a master drive.

Abstract: Roll made of media in one of strip or tape form and process for producing the roll, the roll including a hub with a data recording medium in one of strip or tape form wound thereon, the data recording medium having a tape end fastened on a roll of the data recording medium by way of a printed adhesive strip. A sealing element of the roll is formed by an adhesive strip having an adhesive underside. The adhesive strip overlaps the tape end with its one end by a first length and overlaps a label strip with its other end by a second length. The adhesive strip is adhesively attached to the upper side of the label strip. The adhesive strip is adhesively bonded to the outer circumference of the roll between two overlapping regions in a region with a third length. The label strip is provided on its upper side with an identification coding.

Abstract: Pancake of media in strip or tape form and method of making the pancake, the pancake including a hub onto which the media is wound until an outer wound layer is formed on the pancake, and a sealing element attached to the outer wound layer of the pancake such that a free end of the outer wound layer of the pancake is formed in a region beneath the sealing element. The process provides for winding the media onto a hub and attaching a sealing element to an outer layer of the media, wherein the sealing element is attached to the outer wound layer of the pancake such that a free end of the outer wound layer of the pancake is formed in a region beneath the sealing element.

Abstract: Identification label for coding media in strip or tape form that is wound onto a hub. The label includes information indicating at least a product designation, at least a production code, and at least a quality class or classification, as well as information indicating a position of at least one defect of the media.

Abstract: A process for the preparation of high-quality magnetic dispersions having an Hc>120 kA/m, a residual induction Mr/Mm≧0.9 and an orientation ratio of about 2.7 achieves, with a self-purging single-shaft blade-type kneading apparatus, very advantageous magnetic values of the magnetic coatings and excellent tape characteristics if at least the following features are fulfilled: a) the radial shear gradient in the gap between blade circumference and housing wall is from about 150 to about 1600, in particular from about 500 to about 1400, l/sec b) the circumferential velocity of the kneading blade is from about 20 to about 80, in particular from about 35 to about 60, cm/sec. The magnetic dispersion prepared can be used in particular for data and video recording media having high recording and storage rates.

Abstract: A binder composition, at least containing an inorganic filler and a thermoplastic block copolyurethane having in each case at least one soft segment (A) and at least one hard segment (B), at least one hard segment (B) containing a structural element of the formula I is used in particular for the production of magnetic recording media.

Abstract: A polishing apparatus for reducing the roughness and abrasive shedding of coated tapes comprises a cylinder having coaxial channels or grooves of various forms, which are advantageously thread-like. Axial grooves may be additionally provided.

Abstract: Hub for information media, the hub comprising an outer winding area having a width, a central bore and a center point located on the hub, driving grooves on a circumference of the hub, an outer ring, an inner ring, and a connector for connecting the outer ring with the inner ring. The width of the outer winding area of the hub is at least equal to a width of the information medium. The connector comprises diagonal ribs running diagonally at a slant in an axial direction and sloping alternately in accordance with two axial directions of the hub and in neighboring segments, wherein respective pairs of neighboring diagonal ribs are sloped in different directions and have a further rib between them, and wherein their plane is formed by a radial direction from the center point of the hub to the further rib and an axis of rotation of the hub.

Abstract: Device and method for dividing media in assembly machines, comprising a pneumatic linear guide unit with fitted stroke limiting units, the media being movable on a support in a first direction. A carriage has a linear movement in a direction which runs transversely with respect to the first direction. A holder is attached to the carriage and a knife is attached to the holder by way of a rotatable shaft. Constructional elements convert linear movement of the carriage into a rotational movement of the knife, wherein the knife cuts transversely through the media while the tape is firmly held on the support.

Abstract: Water-resistant pigmented recording material which is useful for inkjet printers. The ink-receiving layer comprises silica dispersions modified with alkylsilanes, water-soluble plasticizers and polymeric ink fixatives. The material provides image recording in photo quality on conventional types of printers.

Abstract: Processes and apparatuses for partly disassembling tape cassettes having at least one closure flap comprise separating the closure flap from the cassette or from the cassette housing at an early time, before, during or shortly after the opening of the cassette. Several process methods and examples of apparatus are specified. The separating methods and apparatuses can be expediently used for all tape cassettes with one or more closure flaps, it being possible for these to be any type of audio, video and data cassettes.

Abstract: A UV-curable binder composition, a coating material which contains such a binder composition, a photoiniator mixture suitable for use in these coating materials, and a magnetic recording medium which contains such a UV-curable coating material are described.

Abstract: Multilayer magnetic recording medium is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties in the entire recording wavelength range and good mechanical properties and possesses a flat frequency response and which has at east one upper magnetic recording layer less than 0.5 &mgr;m thick and at least one lower layer which contains a magnetically soft pigment.

Abstract: Multilayer magnetic recording medium which is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties and good surface smoothness and can absorb a large amount of lubricant in the lower layer and has at least one upper magnetic recording layer less than 0.5 &mgr;m thick and at least one lower layer which contains a magnetically soft pigment.