Abstract: Disclosed herein are a tissue management impression material and a method of application into the sulcus of a patient, whereby the tissue management impression material is a part of the final dental impression made when manufacturing a dental device, such as a crown.

Abstract: An end effector suitable for manipulating articles such as mail flats is disclosed. This end effector has parallel reciprocating arms having suction cups for gripping the article to be manipulated and mechanical grippers mounted on the arms outboard of the suction cups. These mechanical grippers may be actuated to provide a mechanical grip on a manipulated article in addition to the suction grip.

Abstract: A photographic film recorder includes film-exposing apparatus having a laser light source for exposing the film, and a photographic film-developing apparatus. A film transport means transports the film at the same velocity through both the exposing apparatus and the developing apparatus, under control of a received film velocity signal. The time period each element of the film is in the developer varies inversely with film velocity. A plurality of transfer function look-up tables are provided for translating a received video density signal to a corresponding exposure signal for controlling the laser light source. Means responsive to the film velocity signal selects for use a transfer function look-up table which is appropriate for the time period each element of the film is in the developer.

Abstract: A photographic recorder includes an optical scanner unit positioned to scan transverse lines across a photographic film driven slowly in a linear direction. The optical scanner unit is mounted for angular displacement, so that the scan-line across the film can be set to any angle in a range of about .+-.45 degrees relative to a line at right angles to the direction of motion of the film.