Highly durable tape cartridge drive belt
US5131891A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1991 |
| Grant date | Jul 21, 1992 |
| Priority date | — |
| Expiry date | Feb 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/08778
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A highly durable, usually hydrolytically stable, drive belt for belt-driven tape cartridges is disclosed which is a thin continuous flexible loop of at least one polyetherurethane (preferably non-hygroscopic), which is both durable and strong. Preferably the belt will be composed of a composite of two separate polyetherurethane materials, one having a higher molecular weight and longer polymer chain length than the other. Also preferably, these two polyetherurethane materials will be blended to a homogenous mixture by melting both materials and blend the molten material and forming the belt from the resulting polymeric mixture. Optionally a single polyetherurethane polymer may be used as the material comprising the belt if that single material has the requisite properties of flexibility and durability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.