Apparatus for intermittently advancing a sheet of indeterminate length
US4209120A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1978 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Oct 26, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H23/085
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for the division-true, intermittent feed of a sheet of indeterminate length has a sheet supply roll; a table for receiving the sheet from the supply roll; a sheet tensioning device disposed between the supply roll and the table; an advancing device for advancing the sheet in each operational cycle through a forward feed stroke that is greater than the divisional distance defined by spaced markings on the sheet; a cutting device for cyclically severing a length from the sheet subsequent to the forward feed stroke; a reversing device for retracting the sheet in each operational cycle through a centering stroke subsequent to the forward feed stroke. The reversing device includes a force-exerting arrangement--constituted solely by the tensioning device--for imparting to the sheet a force for executing the centering stroke, a sensor head cooperating with the moving sheet for responding to the presence or absence of the sheet markings; a solenoid assembly having a solenoid and being connected with the sensor head for changing the state of energization of the solenoid as a function of the response of the sensor head to the sheet markings and an armature cooperating with the s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.