Contoured head assembly for use in a cassette loaded recorder

• US 4,888,657 A
• Filed: 11/21/1988
• Issued: 12/19/1989
• Est. Priority Date: 12/28/1987
• Status: Expired due to Term

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Brock, George W., Lacey, Christopher A.
• Primary Examiner(s): Wolff, John H.
• Application Number:
  US07/274,540
• Time in Patent Office: 393 Days
• Field of Search: 360/122
• US Class Current: 360/122
• CPC Class Codes: G11B 15/62 Maintaining desired spacing between record carrier and head
• CPC Class Codes: G11B 23/047 Guiding means
• CPC Class Codes: G11B 5/4893 relative to moving tape

Abstract

To obtain the correct tape wrap angle at the head in a cassette loaded recorder, tape guiding support "outriggers" integral with the head assembly are provided. The outriggers are located on either side of the active portion of the head structure to guide the tape and to establish the tape/head wrap angle independent of the exact locations of the cassette guides. Slots separate the active head structure from each of the outriggers, presenting an edge at each side of the head to skive any air film adherent to the moving tape as it approaches the head'"'"'s transducer. Additionally, the entire head and outrigger structure is fabricated from the same or mechanically similar materials and has an overall constant area profile contour which wears at a uniform rate due to tape abrasion.

Claims

1. In a recording system including a magnetic transducer assembly, the improvement comprising:

a, means for transporting a recording medium over said magnetic transducer assembly, said assembly having a magnetic transducing element located thereon,

b, means, external to said magnetic transducer assembly, for guiding said recording medium at nominal wrap angles relative to said magnetic transducing element,

c, said magnetic transducer assembly further comprising

an arcuate surface extending in the direction of said medium'"'"'s motion, and

having two slots therein, said slots dividing said arcuate surface into a first outrigger, a central land for containing said magnetic transducing element at the apex thereon, and a second outrigger, wherein 1, the edges of said slots prevent entrainment of air between said medium and said magnetic transducing element, 2, said outriggers so position said medium as to maintain said nominal wrap angles substantially independent of variations in said means for guiding, and 3, said arcuate surface being so shaped that said recording medium continues to exert a constant pressure across said surface as said surface wears, whereby said surface maintains a constant area profile.

2. The magnetic transducer assembly of claim 1 wherein said outriggers are symmetrically located relative to said magnetic transducing element.

3. A magnetic transducer assembly comprising:

a, a land having a magnetic transducer located on a surface at the apex thereof for recording or playing back a magnetic tape,

b, a first outrigger adjacent to said land whereby said magnetic tape contacts said first outrigger on a surface thereof before contacting said land,

c, a second outrigger adjacent to said land whereby said magnetic tape contacts said second outrigger on a surface thereof after contacting said land, and

d, said surface of said first outrigger, said surface of said land and said surface of said second outrigger comprise a contact area profile contour of said magnetic transducer assembly, wherein a cooperating magnetic tape traversing said assembly provides uniform pressure across said surface of said first outrigger, said surface of said land and said surface of said second outrigger whereby said constant area profile contour remains invariant under wear.