Film punch registration
AssigneeProtocol Engineering Limited
InventorDonald Mayston
Life of this patent
Estimating the term…
Abstract
In a method of and apparatus for punching a set of exposed films to obtain punch registration, two magnified images of respective areas of film are projected onto respective screens of two independently movable projection units so that either the magnified images of portions of image areas of two superimposed films can be brought into alignment on the screens or register markings on, or portions of the image areas of, each film in succession can be brought into alignment with respective markers on or adjacent the screens.
Claims14
Apparatus for punching a plurality of exposed films to obtain punch registration, said apparatus comprising a platform for supporting the films to be registered and punched, a plurality of punches for punching the films, two projection screens, optical means for magnifying two images of respective areas of film, means for projecting the two magnified images onto the two screens respectively, the screens, the optical means and the projection means for the two images respectively being carried by two projection units each of which is independently movable with respect to the platform, means for producing a cushion of air under each projection unit on which the latter can be moved and means for connecting each projection unit alternately to a source of air pressure to produce the cushion of air and a source of vacuum to hold the projection unit in an in-register position.
Apparatus for punching a plurality of exposed films to obtain punch registration, said apparatus comprising a plurality of punches for punching the films, a transparent platform for supporting the films to be registered and punched, two projection screens, optical means for magnifying two images of respective areas of film, means for projecting the two magnified images onto said two screens respectively, the screens, the optical means and the projection means for the two images respectively being carried by two projection units, each of which is independently movable with respect to the platform and comprises two members which respectively project over and beneath the platform, one above the other, one of said members carrying a light source and part of said projection means and the other of said members carrying another part of said projection means, and said optical means and including a housing within which the other part of the projection means is disposed and either of said members carrying a respective one of said screens, means for producing a cushion of air under each projection unit on which the latter can be moved, and means for connecting each projection unit alternately to a source of air pressure to produce the cushion of air and a source of vacuum to hold the projection unit in an in-register position.
Dependencies are inferred from the claim text.