Method of forming graded shade band on substrate
US4138284A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1978 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Jan 9, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of forming a colored shade band having a relatively wide portion of essentially uniform intensity and a relatively narrow boundary portion of graded intensity by spraying a dye composition along a longitudinally extending edge portion of a non-electroconductive substrate such as a glass sheet or a sheet of plastic. In one embodiment of this invention, the substrate is sprayed to form the graded band and then laminated to a layer of plastic interlayer material to produce a laminated window having a shade band having a desired transverse pattern of graded intensity along a longitudinally extending edge portion thereof. After the dye composition is applied to a sheet of rigid transparent material to form the band, the coated sheet is assembled with the band facing a layer of interlayer material to form a sandwich to be laminated, the band is transferred from the sheet to the layer during lamination and forms a continuous looking band free of any disturbing features such as mottled appearance and having a boundary along a smooth line and a pattern of intensity similar to that of the colored shade band initially developed. In another aspect of this invention, the graded band is…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.