Abstract: A high-throughput, high-end-product-recovery, lineal log bucking device featuring continuous stem travel during the cutting process by using a simple and efficient machinery design for economy of equipment and monies. The apparatus includes: (1) a saw for cutting stem into logs; and (2) apparatus for accelerating the carrier up to the speed of the stem conveyor(s), maintaining the speed during the cut, decelerating the carrier, and then returning the carrier to its starting point.

Abstract: A high-throughput, high-end-product-recovery, lineal log bucking device featuring continuous stem travel during the cutting process by using a simple and efficient machinery design for economy of equipment and monies. The apparatus includes: (1) a saw for cutting stem into logs; and (2) apparatus for accelerating the carrier up to the speed of the stem conveyor(s), maintaining the speed during the cut, decelerating the carrier, and then returning the carrier to its starting point.

Abstract: An inkjet printer applies symmetrical driver vibrations to the full length of a linear nozzle array. A nozzle array and nozzle support plate are supported on the end of a supporting housing which also supports a plate for defining an ink flow cavity. The housing also defines an acoustic cavity which extends from the ink cavity to an end of the acoustic transducer and is filled with acoustically transmissive material. A transducer is bonded to the distal end of this acoustic material, so that when the transducer is energized, the vibrations are transmitted uniformly through the acoustically transmissive material and the acoustic cavity to the ink cavity, symmetrically driving the ink out through the nozzles of the nozzle plate. It has been found that the acoustic cavity in fact has a critical length which is related to the frequency of operation of this system. Specifically, for a frequency of 110 KHz, the length of the acoustic cavity should be 4.

Abstract: The drop projection device has an array of nozzles communicating with an ink cavity fed from an associated pressurized ink reservoir and has an acoustic cavity closely associated with the ink cavity. The acoustic cavity is filled with a solid material, and may be separated from the ink cavity by a membrane that may be selected of any ink compatible material for transmitting disturbances from the solid material to the ink channel (the membrane is not required, however). A transducer is mounted to the rear of the solid filled cavity, essentially in air.The transducer is a block of piezoelectric material separated into a plurality of parallel fingers by slices made from one side of the block. The height-to-width or height-to-thickness ratios are less than 10:4. The solid acoustic cavity is filled with a material having an acoustic impedance which is substantially equal to the ink acoustic impedance. The cavity itself is defined by a material having a high acoustic impedance.

Abstract: A method of assembling a stimulator for an inkjet printer by attaching separate piezoelectric elements to a plastic or metallic membrane sheet which sheet, after encapsulation of the piezoelectric transducers, may be cut into a plurality of stimulators. Each individual stimulator which now comprises a membrane, a piezoelectric element, and the encapsulating material can then be bonded to an ink fluid cavity.

Abstract: A fluid jet print head for producing a plurality of jet drop streams of fluid includes a manifold defining an elongated cavity and an orifice plate defining a plurality of orifices, arranged in at least one row, which communicate with the cavity. A transducer arrangement, including a piezoelectric means, is mounted in the cavity and is spaced from the orifice plate so as to define a fluid reservoir therebetween. The transducer arrangement further includes acoustic isolation material which surrounds the piezoelectric means and supports the piezoelectric means in the cavity. The transducer means, when electrically excited, produces pressure waves of substantially uniform wave front which travel through the fluid in the reservoir toward the orifice plate and cause break up into jet drop streams of fluid flowing through the orifices. The piezoelectric means may include an elongated transducer which defines a plurality of slots extending alternately from opposite sides of the transducer partially therethrough.