Sentence:  Papers coming off the press are automatically folded and put on six Newsveyor conveyors that deliver papers to the mailroom to be stacked in bundles of 30 to 40 papers, <WSD>underwrapped</WSD>, tied and fed into a rapid-paced News-sort system. 
Meaning of the word marked with <WSD> tags:  To provide with a wrapping that will subsequently be covered or wrapped by something else.