EP 0036987 A1 19811007 - Bulk material handler and feeder.
Title (en)
Bulk material handler and feeder.
Title (de)
Vorrichtung zur Handhabung und Zuführung von Massenwerkstoffen.
Title (fr)
Dispositif de manipulation et d'alimentation pour un matériau en vrac.
Publication
Application
Priority
US 8000350 W 19800331
Abstract (en)
A bulk material feeder (10) has two rollers (12,14), at least the lower (14) of which is driven (24,26). Strip material (34) is threaded around the side of the upper roller (12) toward the direction of feed, between the rollers (12,14), around the side of the lower roller (14) opposite the direction of feed and to downstream machinery (38) spaced from the feeder (10). Roller (12,14) spacing is greater than material (34) thickness precluding compression of the material (34). Feed is produced by friction between the roller (14) and material (34) only. Feed rate is greater than usage thereby producing a depending loop (40) between the feeder (10) and the downstream machinery (38). In one embodiment, increasing loop (40) size decreases material (34) and roller (14) contact, causing relative slippage and a discontinuance of feed. In another embodiment, both rollers (12, 14) are driven and loop (40) size is limited by a photoelectric device (42) and associated control circuitry.
IPC 1-7
IPC 8 full level
B65H 20/00 (2006.01); B65H 20/02 (2006.01); B65H 20/24 (2006.01); B65H 20/30 (2006.01); B65H 26/00 (2006.01)
CPC (source: EP)
B65H 20/02 (2013.01); B65H 20/24 (2013.01); B65H 2408/212 (2013.01)
Citation (search report)
- US 3640438 A 19720208 - MORSE JOHN E, et al
- US 3867826 A 19750225 - NOE OSKAR
- US 2658691 A 19531110 - MALLORY EDWIN E
- US 2671495 A 19540309 - ROBERT IREDELL, et al
- US 1846044 A 19320223 - WIKLE GEORGE F
- FR 2083896 A5 19711217 - EASTMAN KODAK CO
- US 3853267 A 19741210 - CADWELL R, et al
- FR 2193389 A5 19740215 - BWG BERGWERK WALZWERK [DE]
- GB 779927 A 19570724 - LEVEY FRED K H CO INC
- FR 2090859 A5 19720114 - PEMBROKE CARTON & PRINTING CO
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0036987 A1 19811007; JP S57500469 A 19820318; WO 8102879 A1 19811015
DOCDB simple family (application)
EP 81101892 A 19810314; JP 50097780 A 19800331; US 8000350 W 19800331