Sperry Corporation

Iolab Corporation

Joseph M Curley

James C Barnitz

David C Downey

Faquir C Mittal

Arnold Schonfeld

A vacuum system and a method of operating a vacuum system. The system comprises a vacuum line, a pump, a pump motor, a pressure adjusting assembly, a pressure sensor and a control means. The pump is connected to the vacuum line for drawing fluids therefrom, and the motor is connected to the pump to drive the pump. The pressure adjusting assembly is connected to the vacuum line for conducting fluid into that line at an adjustable rate. The pressure sensor is connected to the vacuum line to generate a pressure signal representing the pressure in the vacuum line. The control means receives the pressure signal and generates a system control signal that is used to adjust the pressure in the vacuum line. The specific manner in which the pressure in the vacuum line is adjusted depends on the value of that pressure, and in particular, whether that pressure is in a first range or a second range. If the pressure in the vacuum line is in the first range, the pressure in the vacuum line is adjusted by varying the amount of fluid conducted into that line through the pressure adjusting assembly. If the pressure in the vacuum line is within the second pressure range, the pressure in the fluid line is adjusted by varying the speed of the pump. The vacuum system is well suited for use during ophthalmic surgery to aspirate the surgical site.

Vacuum system and a method of operating a vacuum system

A vacuum system and a method of operating a vacuum system. The system comprises a vacuum line, a pump, a pump motor, a pressure adjusting assembly, a pressure sensor and a control device. The pump is connected to the vacuum line for drawing fluids therefrom, and the motor is connected to the pump to drive the pump. The pressure adjusting assembly is connected to the vacuum line for conducting fluid into that line at an adjustable rate. The pressure sensor is connected to the vacuum line to generate a pressure signal representing the pressure in the vacuum line. The control device receives the pressure signal and generates a system control signal that is used to adjust the pressure in the vacuum line. The specific manner in which the pressure in the vacuum line is adjusted depends on the value of that pressure, and in particular, whether that pressure is in a first range or a second range. If the pressure in the vacuum line is in the first range, the pressure in the vacuum line is adjusted by varying the amount of fluid conducted into that line through the pressure adjusting assembly. If the pressure in the vacuum line is within the second pressure range, the pressure in the fluid line is adjusted by varying the speed of the pump. The vacuum system is well suited for use during ophthalmic surgery to aspirate the surgical site.

Apparatus is disclosed for positioning a continuous paper form having uniformly positioned seams and emanating from a high speed printing device, such as from a high-speed computer printer, in a bin or stacker. Air jets positioned on the stacker are utilized in a mode whereby air bursts from the jets impinge at discrete locations on a top surface of the form as it emanates from the printer. The air bursts cause the continuous paper form to fold naturally in a stacker bin at the paper seams.

Continuous printed paper stacking device

A graphic forms overlay apparatus to be used with non-impact printers requiring the use of a movable light sensitive medium such as laser printers is disclosed. Laser printers use a sweeping laser beam and a movable light sensitive medium to image data from a data processing source for printing. A graphic forms pattern is overlayed on the data imaged on the light sensitive medium for simultaneous printing of the data and pattern. To accomplish this a negative of the pattern is mounted on a hollow rotatable forms drum, and inside the drum a fluorescent tube is fixedly mounted for illuminating the negative. A linear portion of the light image of the negative formed thereby is reflected by an optical system of lenses and mirrors onto adjacent linear portions of the light sensitive medium being swept by the laser beam for imaging of data. Synchronism between rotation of the forms drum and information being written on the movable light sensitive medium is provided by logic circuitry connected between the printer and a stepping motor which is coupled to the forms drum for rotation of the forms drum. A top of page signal from the printer cooperates with the logic circuitry to start synchronous rotation of the forms drum. An alignment signal from an alignment means within the overlay apparatus cooperates with the logic circuitry to stop rotation of the forms drum in an initial position ready for the next top of page signal. Adjustable counter circuitry provides a means for externally varying the rotational speed of the forms drum.

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Lansdale, PA, United States of America

Joseph M Curley