A process for wrinkleproofing cellulosic textiles comprises treating the textiles with a finish and drying the treated textiles, wherein the finish comprises one or more water-soluble or water-dispersible hydrophobically modified polyethyleneimines and/or polyvinylamines.Suitable hydrophobically modified polyethyleneimines are hydrophobically modified homopolymers of ethyleneimine, hydrophobically modified graft polymers of polyamidoamines or of polyvinylamines. Suitable hydrophobically modified...

A pole base assembly for a magnetic recording/reproducing apparatus for guiding a tape drawn from a reel through a predetermined path in parallel or substantially in parallel toward a lead surface of a head drum. The pole base assembly comprises a pole base disposed to approach and retreat from a side of the head drum when the tape is loaded and unloaded, respectively, a sloping pole disposed to be sloped on the pole base, to be parallel or substantially parallel to the lead surface of the head ...

A helical wrap tape transport system having a plurality of components cooperating to provide a low friction and highly accurate transport of magnetic tape for video broadcasting. The transport system has a helical scanner assembly with a rotating scanning drum having helical surface V-grooves which create an air bearing for magnetic tape wrapped across the drum and oppositely mounted recording transducers which permit continuous recording on a 180.degree. tape wrap around the drum, and a station...

A tape guide assembly for registering the record surface of a longitudinally moving record tape with respect to a transducer moving in a transverse plane crosswise to the direction of movement of the tape includes a female guide unit including a pair of axially spaced tape registration land surfaces formed as a portion of an imaginary cylinder and flanking the transverse plane of movement of the transducers moving crosswise of the tape. An elongate barrel, disposed coaxially with respect to the ...

A magnetic tape guiding device for use in a magnetic tape instrument having a magnetic tape, a supply reel for supplying the magnetic tape, a drum arrangement including a rotary magnetic head arrangement disposed in a drum having a transverse division for the recording and playback of the magnetic tape, and a take-up reel for receiving the magnetic tape; the magnetic tape having a path extending from the supply reel to the drum where it follows a helical path along the circumference of said drum...

In a video recorder having a fully rotatable drum over which a recording tape is advanced, lateral tape wander is controlled by the use of apparatus which provides edge guidance for the advancing tape while the tape is still on the rotating drum surface. The invention proposes the use of a rotatable drum having a groove which extends circumferentially around the outer drum surface. An edge guide member extends into the groove, providing tape edge guidance while permitting the drum to rotate free...

A tape recording and/or reproducing apparatus of the type having a tape guide drum with a circumferential slot through which at least one rotary transducer projects for recording and/or reproducing signals on a tape running against the periphery of the drum in a path which extends about at least a portion of such periphery; is provided with a tape guide assembly which includes a rigid guide, for example, constituted by an axially facing shoulder on the drum, engageable by the lower longitudinal ...

A head drum for supporting a magnetic head for magnetically recording information on and reproducing information from a magnetic tape includes an inner body of an aluminum alloy, and a wear-resistant layer of a sintered powdery alloy disposed around an outer circumference of the inner body in at least a region for sliding contact with an elongate magnetic recording medium. The wear-resistant layer has a thickness of at least 0.2 um, and the sintered powdery alloy comprises a powdery alloy of 17 ...

In an apparatus for recording and/or reproducing signals on a magnetic tape by means of at least one rotary head which extends into an annular gap between coaxial drum members for scanning oblique tracks on the tape while the latter is guided helically about the peripheral surfaces of the drum members, at least one of the drum members is rotated at a sufficient speed to produce an air bearing or cushion between the tape and the peripheral surface of each rotated drum member, and the peripheral s...

A helical tape guide around a stationary drum encasing a rotating scanner assembly, the tape guide has a plurality of curved plates arranged around and displaced from the drum and a series of spatially positioned pins projecting from the plates into corresponding holes in the drum, the pins being arranged in a helical path around the drum forming a guide path for the lead end of a tape leader threaded around the drum by a tape mechanism.