Patent ID: 7410314

Claim:
An apparatus for receiving, inverting and returning sheets ( 62 ) from and to a printer ( 1 ) for large-sized paper, said printer being adapted to be automatically fed a web of paper ( 60 ) from a supply of paper ( 61 ) through an inlet ( 6 ) of said printer, defined by a portion of a paper-supporting plate ( 7 ), where said printer further is adapted to print and cut sheets ( 62 ) of said web of paper and to guide the printed and cut sheets ( 62 ) out of said printer through a separate outlet ( 13 ) and into said apparatus, where the apparatus is positioned at the inlet and the outlet of said printer, and is adapted to receive the printed and cut sheets ( 62 ) from said outlet and to return said printed and cut sheets to the printer in an inverted state, said apparatus comprising a pivoting first guide means ( 14 ) which in one position guides the printed and cut sheets ( 62 ) into the apparatus and in a second position guides said printed and cut sheets past said apparatus to be discharged from said printer, wherein the apparatus comprises a first driving roller means ( 36 ) and a second guide means( 21 ) pivotally arranged relative to said roller means, where the second guide in a first position guides the printed and cut sheets ( 62 ) advanced into the apparatus round the first driving roller means ( 36 ) during the initial movement of the printed and cut sheets ( 62 ) into the apparatus, and where said second guide means in a second position presses said printed and cut sheets ( 62 ) into a driving engagement with the first driving roller means ( 36 ) in such a manner that said first driving roller means takes over driving of the printed and cut sheets ( 62 ) both during the remaining movement of said printed and cut sheets ( 62 ) inside the apparatus as well as during movement of said printed and cut sheets out of said apparatus again and into the printer through the inlet ( 6 ) of said printer while the direction of rotation is inverted, and wherein the apparatus comprises a second driving roller means ( 46 ) adapted to engage a portion of the web of paper ( 60 ) left on the paper-supporting plate ( 7 ) after the printed sheet ( 62 ) has been cut off and to pull said portion temporarily backwards towards the supply of paper ( 61 ) while the printed and cut sheet is being inverted so that said printed and cut sheet ( 62 ) can be guided into the printer without colliding with the web of paper ( 60 ).