Minnesota Mining and Manufacturing Company

Robert A Von Behren

David P Smith

David D Madsen

Charles A Barnes

The belt of a two-reel tape cartridge is stretchably entrained around the tape packs, a belt driving roller, and a pair of idler rollers, each of which is journalled on a shaft projecting from one end of an arm. The other end of each arm is pivotably mounted in the cartridge so that the idler rollers ride on the belt and are pressed by the belt against the belt and the underlying tape pack.

Low-friction, belt-driven tape cartridge

A belt driven reel-to-reel tape cartridge includes two tape guides for guiding the tape to and from respective tape reels. The tape guides have a large radius of curvature and are flanged to form a long trough to guide and align the tape to improve tape tracking. This also provides hydrodynamic lift by creating an air film between the tape and the tape guide to reduce the friction between the tape backside and the tape guide. The radius of curvature can be constant or can vary from a larger radius at the ends to a smaller radius in the middle.

Tape guide for a data cartridge

In a tape which is driven by an elastic pretensioned belt, discontinuities such as embossings in the surface of the belt promote the release of air from between the belt and the underlying tape, thus minimizing variations in tape tension and tape speed.

Method of making a belt for belt-driven recording tape pack

Belt for belt-driven recording tape pack

A composite magnetic head adapted to record and read records to and from a record carrier particularly suited to a multitrack record carrier, and more particularly suited to a multitrack magnetic tape. The composite magnetic head may be moved transversely with respect to the direction of movement of the record carrier so that head alignment with any one of multitracks of the record carrier may be achieved. The record carrier contacts the head assembly defining a scrub surface. A yoke is provided supporting a ferrite core containing an effective gap which permits the head to be physically mounted with respect to the record carrier. The yoke is constructed and mounted so that one surface of the yoke is coplanar with the scrub surface of the ferrite core and which extends in both directions transversely to the motion of the record carrier at least a distance equal to the width of the record carrier in each direction so that the record carrier may be evenly supported over the range of movement of the head transverse to the direction of movement of the record carrier. A central open area of the yoke is provided to allow for physical access to the coil windings of the ferrite core.

Growing community of inventors

Lilydale, MN, United States of America

Robert A Von Behren