Roll lift and drive assembly
US5002235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1988 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Nov 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S414/124
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A printing press material roll lift and drive assembly (40) has a base (16) and a lift support frame (18). The lift support frame provides support for opposed front and rear vertical rails (50). A U-shaped carriage (54) is mounted for elevation on the rails and includes side support plates (56) having rail rollers (57) and an upper plate (58). The carriage is raised and lowered by a releasing ram (80) attached to the support frame at its upper end (82) and to the carriage at its lower end (86), said support plates including bearings receiving a carriage shaft (64). The shaft includes a cantilevered outer end (68) receiving the paper roll core (69) and an inner end (72). The inner end is driven by a magnetic particle clutch (102) mounted to the base and having a drive shaft (106) by means of an endless belt (112) extending between a drive shaft pulley (110) and a carriage shaft pulley (74 ). The endless belt includes a belt tensioner (114). The horizontal distance between the motor drive shaft and the carriage drive shaft is constant while the vertical distance between said shaft is variable and the belt tensioner provides that the paper roll (14) can be raised and lowered without o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.