Form for making two-sided carbonless copies of information entered on both sides of an original sheet and methods of making and using same
US5135437A · kind A · utility
Inventor
Key dates
| Filing date | Jun 24, 1991 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Jun 24, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/124
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The carbonless copy form of this invention reproduces information written or printed on both the front and back surfaces of an "original" page onto the two (front and back) surfaces of a "copy" page. In one embodiment, the form is formed of a single sheet of paper comprising a clear (uncoated) original page and a copy pages coated with carbonless CF treatment on both sides. A separate intermediate sheet, coated with carbonless CB treatment on at least one side is interposed between the folded and refolded original copy pages to effect reproduction of information entered on the front and back surfaces of the original page onto the back and front surfaces, respectively, of the copy page. In other embodiments, the original, copy and intermediate pages are formed from a single sheet of paper. The original page is clear, the copy page is CF-coated on both sides and the intermediate page is CB-coated on both sides. Various positionings and foldings of the original, copy and intermediate pages are disclosed for effecting reproduction of information entered on both sides of the original page onto both sides of the copy page. Methods of using the carbonless forms are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.