Manufacture of tubular elements for ink jet printers
US4834637A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1986 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Jul 24, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B23/114
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The apparatus for manufacturing ink jet glass tubes includes a vertical mandrel which receives the tubes one at a time from a feeder and rotates them relative to a pair of gas nozzles for their heating. The tube is heated in an axially limited intermediary zone so as to form an hour-glass shaped profile. The profile of the tube is scanned by a television camera which generates two signals indicative of the internal diameter. These are compared electronically with a stored indication of the desired diameter and the two nozzles are rotated into an inactive position when this diameter is reached. The tube is cut along a plane so as to make the profile of the nozzle coincident with a reference profile by a device including an optical device connected to a cutting wheel to permit comparison of the hour-glass profile of the element with the reference profile. The severed end of the tube is then lapped and covered with a non-wettable material. The tubular element is bonded within a piezo-electric transducer, by locating the latter partially in a chamber, after fitting it over the tubular element, while a pump draws an epoxy resin through the chamber and into the space between the transduc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.