Removable doctor blade holder with lockable mount

Abstract

A doctoring apparatus for doctoring a roll surface comprises a doctor blade, a blade holder for applying the doctor blade to the roll surface, and a doctor back having a support surface on which the blade holder is adapted to slide. A locking bar is subdivided into multiple mechanically interlocked segments and is mounted by fasteners on the support surface of the doctor back for movement lengthwise in opposite directions between locked and unlocked positions. The locking bar is configured and dimensioned to fit loosely within a groove on the underside of the blade holder. In its unlocked position, the locking bar permits the blade holder to slide on the doctor back support surface into and out of an operative position adjacent to the roll surface. In its locked position, the locking bar releasably secures the blade holder in its operative position.

1 . A doctoring apparatus for doctoring a roll surface, comprising: 
 a doctor blade;    a blade holder for applying said doctor blade to said roll surface, said blade holder having a groove on its underside;    a doctor back having a support surface on which said blade holder is adapted to slide;    a locking bar subdivided into multiple mechanically interlocked segments;    fasteners for mounting said locking bar on said support surface for movement lengthwise in opposite directions between locked and unlocked positions, said locking bar being configured and dimensioned to fit loosely within said groove, and, when in its unlocked position, to permit said blade holder to slide on said support surface into and out of an operative position adjacent to said roll surface, said fasteners coacting with said locking bar in its locked position to releasably secure said blade holder on said support surface.    
   
   
       2 . The doctoring apparatus of  claim 1  further comprising an adjustment mechanism engageable with one end of said locking bar for shifting said locking bar relative to said doctor back between said locked and unlocked positions.  
   
   
       3 . The doctoring apparatus of  claim 2  wherein said adjustment mechanism comprises a threaded spindle fixed with respect to said doctor back, a nut threaded on said spindle, and a key straddling said nut and secured to an end segment of said locking bar.  
   
   
       4 . The doctoring apparatus of  claim 1  wherein said fasteners extend through slots in said locking bar segments, and wherein said slots have ramped edges coacting in wedged relationship with said fasteners when said locking bar is in its locked position.