DUFTY, RAYMOND JEFFREY;RIX, DOROTHEA ISABEL MAUD; RAYMOND JEFFREY;DUFTY
发明人:
DUFTY, RAYMOND JEFFREY
申请号：
CA2994470
公开号：
CA2994470A1
申请日:
2016.08.08
申请国别(地区):
CA
年份:
2017
代理人:
摘要：
A roller assembly including: a frame； a first undercarriage connected to the frame, the first undercarriage comprising: a first body； a rear roller connected to the first body； and a first overlapping roller that is elongate and connected to the first body； and a second undercarriage connected to the frame, the second undercarriage comprising: a second body； a front roller connected to the second body； and a second overlapping roller that is elongate and connected to the second body, wherein the first undercarriage is positioned adjacent to the second undercarriage such that the first overlapping roller overlaps the second overlapping roller.
