Patent · US Expired

Vacuum drum with countersunk holes

US6043836A · kind A · utility

69Cited by
8References
30Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 24, 1997
Grant dateMar 28, 2000
Priority date
Expiry dateNov 24, 2017

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB41J13/226
  • WIPO fieldTextile and paper machines
  • WIPO sectorMechanical engineering

Abstract

The present invention is for a vacuum drum (300) with countersunk holes (334). In one embodiment, vacuum holes (306), countersunk vacuum holes (334), and blind countersunk vacuum holes (336) on an outer surface of the vacuum drum are connected by vacuum grooves to facilitate holding multiple sheets of media on the vacuum drum (300), which revolves at high speeds.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.