Abstract: A shaker with an open frame, sides, a flat bottom and open ends. The shaker has pre-lubricated sealed bearings and a self-lubricating plastic gear with a metal gear, which not only educes the amount of friction between gear teeth, reduces maintenance and noise resulting from the gears and enables applicant to provide an integral open frame in which the gears are supported. The gears may be inserted into the frame through the openings in the frame. This provides for easy assembly and the absence of lubricant is especially important in the food industry and other industries where contamination of products would be objectionable.

Abstract: Applicant has discovered that the use of plastic gears in connection with metal gears on a main gear reduces the amount of friction between gear teeth and in addition reduces noise resulting from the assembly. Applicant's shaker herein requires a minimal amount of maintenance and will operate for long periods of time. Moreover, Applicant's shaker requires little or no lubrication. The gears may be disposed between the two parts of the housing and the eccentric weights outside the housing or visa versa.

Abstract: A shaker having a hollow housing in the form generally of two hollow cylinders with the central axes disposed from one another and integrally connected together with a closed end and an end shield covering the second end. A first shaft is supported on bearings in the first cylinder concentric to it, with an eccentric weight attached to the first shaft. A second shaft concentric to the second cylinder is supported on bearings concentric to the second cylinder. Only one end of the housing, the other end is closed, has an end cap and the shafts are connected by helical pinions so that the helical pinions urge the weights and shafts in opposite directions from one another.

Abstract: A container filler and weighing system is disclosed. The weighing system is made up of a scale with a support for a container supported on the scale. A vibrator connected to the support so that the material fed into the container from a feeder is packed and settled in the container. An electronic readout is connected to the scale and a digital readout connected to the electronic circuit whereby the readings can be recorded and an annunciator is connected to the electronic circuit to signal when the container is full. The vibrator connected to the container support delivers a vertical component of force that has an especially good and efficient packing reaction on the material in the container.