Apparatus for stacking windows with separator layers therebetween

Claim 1

Apparatus for stacking windows with a layer of separator material therebetween such as paper or the like which comprises window gripping means reciprocally displaceable between first and second positions for gripping windows successively at the first position and depositing them in a stack at the second position, means for delivering windows successively to said first position, means for arresting movement of a window when the window is in position to be gripped by said window gripping means, said arresting means including leading and trailing edge detectors and displaceable abutment means controlled by the detectors for arresting movement of the window, means adjacent said second position for presenting the free end of a strip of said separator material from a supply thereof, nipper means reciprocally displaceable with said window gripping means for gripping said free end of the strip when the gripping means is at said second position and pulling the strip over a stacked window during return of the gripping means to the first position, and means for severing the portion of the strip over the stack from the strip supply and releasing the nipper means to deposit the severed portion on the stacked window.