Head cleaning cassette for a video cassette recorder
US4631615A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1985 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | May 31, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/049
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic video cassette recorder cleaning cartridge includes an enclosed cleaning fluid aerosol cannister actuated via a solenoid and lever in order to release cleaning fluid onto a cleaning tape. Actuation of the solenoid follows from detection of the rotation of the pay-out spool, which includes a camming surface operative upon a momentary switch. A shift register is included to count the revolutions of the pay-out spool and to sound an alarm when a predetermined number of rotations are sensed, whereby the cleaning of the various heads and components of a VCR is accomplished by inserting the cleaner into the VCR and operating in play mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.