JPS55129960A - Rotary drum unit of magnetic recording and reproducing device - Google Patents
Rotary drum unit of magnetic recording and reproducing deviceInfo
- Publication number
- JPS55129960A JPS55129960A JP3469179A JP3469179A JPS55129960A JP S55129960 A JPS55129960 A JP S55129960A JP 3469179 A JP3469179 A JP 3469179A JP 3469179 A JP3469179 A JP 3469179A JP S55129960 A JPS55129960 A JP S55129960A
- Authority
- JP
- Japan
- Prior art keywords
- drum
- rotary drum
- tape
- grooves
- outside circumference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
PURPOSE: To obtain tape running where contact pressure is uniform throughout all the circumference of a rotary drum, by providing a groove inclined for the rotation direction on the rotary drum outside circumference face of a full-rotation rotary drum unit.
CONSTITUTION: Through-hole 4 to which the tip of magnetic head 2 of a rotary magnetic head unit faces is provided in the center of outside circumference face 3 of rotary drum 1. Durm 1 is rotated and driven in the arrow A direction together with the magnetic head unit, and magnetic tape 5 is wound on the outside circumference through approximately 360° into an α form and runs in the arrow A direction and the arrow B direction. Plural grooves 12 extending from lower edge 11 to the part slightly lower than the center position, where through-hole 4 is provided, are provided on outside circumference face 3 of drum 1, and these grooves are a spiral form inclined to the rotation direction of the drum. Magnetic tape 5 wound into an α form runs while sliding on grooves 12 near the leaving side from drum 1, and air enters into grooves 12 due to rotation of drum 1, so that tape 5 can be prevented from being stuck to drum 1 by a formed air film layer, and contact pressure of tape 5 may be uniform.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3469179A JPS55129960A (en) | 1979-03-24 | 1979-03-24 | Rotary drum unit of magnetic recording and reproducing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3469179A JPS55129960A (en) | 1979-03-24 | 1979-03-24 | Rotary drum unit of magnetic recording and reproducing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55129960A true JPS55129960A (en) | 1980-10-08 |
Family
ID=12421399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3469179A Pending JPS55129960A (en) | 1979-03-24 | 1979-03-24 | Rotary drum unit of magnetic recording and reproducing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55129960A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03259447A (en) * | 1990-03-08 | 1991-11-19 | Sony Corp | Recording and reproducing device |
-
1979
- 1979-03-24 JP JP3469179A patent/JPS55129960A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03259447A (en) * | 1990-03-08 | 1991-11-19 | Sony Corp | Recording and reproducing device |
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