Rigid sheet printer/feed board assembly
US5809878A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Sep 16, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F15/0854
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A stencil screen printing apparatus for printing rigid sheets comprising an intermittently rotatable cylinder, a reciprocable stencil screen frame, a power drive for the cylinder and stencil screen frame to move them in synchronism with each other, a vertically reciprocable squeegee above the cylinder, infeed belts for feeding rigid sheets along a path toward the cylinder, a variable speed drive for the infeed belts, and controls to slow the drive for an increment of the belt advancement and then stop the drive, sheet pushers and a variable speed servo screw drive operably connected to the sheet pushers, the sheet pushers being forwardly shiftable toward the cylinder to push the rigid sheet front edge beneath the squeegee and the stencil screen frame, and side registry alignment pusher tabs and a variable speed servo screw drive for laterally aligning the rigid sheet relative to the cylinder, whereby the sheet pushers and the side registry tabs simultaneously align the sheet at 90.degree. locations for accurate printing on the sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.