| 摘要 |
<p>Article feeding apparatus is disclosed comprising a driven roller (11) and a pressure roller (13) resiliently urged toward the driven roller. Movement of the pressure roller toward the driven roller is controlled by means of a damper (23) containing material having electro-rheological properties. An electric potential of controlled magnitude is applied selectively to the material to control movement of the pressure roller. The apparatus is described in relation to a print drum (11) and impression roller (13) of a franking machine.</p> |
