Deletion of Synch roll

Comment: to Video tape recorder or Vertical Roll as preferred 
Stance: merge
Cited policy: Wikipedia:Deletion policy (WP:ATD)

Comment: I found one seemingly relevant use of "synch roll": https://books.google.com/books?id=C39nU_byNRcC&pg=PA13#v=onepage&q=synch%20roll. However, the meaning of the term in this context may not be the same as in the article. Besides a bunch of  mentions, I could not find any other relevant use of "synch roll" or "sync roll
Stance: delete
Cited policy: Wikipedia:Verifiability (WP:CIRCULAR)