Multiple-channel tubular devices
US4127398A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1965 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Aug 20, 1985 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2203/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
1. A process for forming a multiple-channel micro-tubular device comprising the following steps: PA1 Assembling a plurality of individual tubes of heat deformable material into a closely packed array of a predetermined cross section; PA1 Applying heat to said array to fuse said tubes into a unitary honeycomb structure; PA1 Drawing said heated structure to reduce its cross section by at least an order of magnitude; PA1 Cutting the drawn honeycomb structure into segments of a predetermined length and entrapping gas in each of the component tubes of said segments at a predetermined temperature below the fusion temperature of said material; PA1 Packing a plurality of said segments together to form a cluster; PA1 And heating said cluster to a temperature above said predetermined temperature to fuse them into a unitary structure without collapsing said tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.