Catching apparatus and method for jet drop recording
US3936135A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1974 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Jun 5, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/1853
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a jet drop recording system a drop catcher includes a drop impinging face having a narrow slot at its lower edge so that drops impinging on the face may travel over it to the slot for removal from the system. A reduced pressure is maintained in the catcher to draw the recording material through the slot and the size of the slot and the pressure differential across it are adjusted so that a meniscus is formed at the mouth of the slot. The surface tension of the recording material then acts in opposition to the reduced pressure tending to draw the material into the catcher and maintains the slot full of recording material. This meniscus, in effect, forms a "seal" which prevents air from being drawn into the catcher and eliminates air currents in the vicinity of the catcher which might affect the trajectory of drops intended for deposit on the receiving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.