Paper slot acoustical seal

Claim 1

IN A PAPER HANDLING MACHINE HAVING A CASING IN WHICH A DOOR IS ARRANGED TO PROVIDE ACCESS TO ITS INTERIOR, THE COMBINATION OF: MEANS PROVIDING A SLOT AT ONE END OF SAID DOOR THROUGH WHICH A SHEET OF PAPER MAY BE FED BY A PAPER CARRYING MEMBER SPACED AT A DISTANCE FROM SAID SLOT, SAID MEANS COMPRISING A SURFACE ON SAID CASING AND A COMPLEMENTARY SURFACE AT ONE END OF SAID DOOR, ONE OF SAID SURFACES BEING RECESSED; A PLURALITY OF MEMBERS DISPOSED IN ENDWISE ABUTMENT IN SAID RECESS AND HAVING AT LEAST ONE SIDE WITH A CYLINDRICALLY CURVED SURFACE; AND A LIP ADJACENT SAID RECESS FOR REDUCING A PORTION OF THE RECESS TO PREVENT THE ESCAPE OF THE MEMBERS WHEN SAID DOOR IS OPENED BUT PERMITTING A SUFFICIENT MOVEMENT OF THE MEMBERS OUT OF THE RECESS SO THAT A CONTINUOUS CYLINDRICALLY CURVED SURFACE ENGAGES THE OTHER SLOT SURFACE AND CLOSES THE SLOT WHEN THE DOOR IS CLOSED, SAID MEMBERS BEING INDIVIDUALLY RETRACTABLE BY THE PAPER FEEDING THROUGH THE SLOT SO AS TO PERMIT EASY PASSAGE OF THE PAPER THERETHROUGH WHILE MAINTAINING AN ACOUSTICAL SEAL ALONG THE ENTIRE LENGTH OF THE SLOT REGARDLESS OF THE WIDTH OF THE PAPER.