초록 ▼

A portable mixing/delivery apparatus mixes dry pre-blended materials, such as homogeneous cementitious combinations of dry sand, cement, Lime, color pigments, etc., packaged in large bulk bags for use at a remote construction site. The bulk bag is lifted by a removable rack having plural lift eyes a

A portable mixing/delivery apparatus mixes dry pre-blended materials, such as homogeneous cementitious combinations of dry sand, cement, Lime, color pigments, etc., packaged in large bulk bags for use at a remote construction site. The bulk bag is lifted by a removable rack having plural lift eyes and the combination is positioned over a height adjustable frame. The granular material is then discharged into a continuous mixer having a dynamic input mixing stage, an output dry-to-wet mixing stage, and a transition stage therebetween. The entire assembly (bulk bag, frame and continuous mixer) is portable and can be lifted such as by a forklift to the height of a masonry scaffold for dispensing the mixed, wet granular material directly to the point of use. The apparatus allows the continuous mixer and its discharge tube to rotate to facilitate dispensing of the material directly to the point of use.

대표청구항 ▼

A portable mixing/delivery apparatus mixes dry pre-blended materials, such as homogeneous cementitious combinations of dry sand, cement, Lime, color pigments, etc., packaged in large bulk bags for use at a remote construction site. The bulk bag is lifted by a removable rack having plural lift eyes a

A portable mixing/delivery apparatus mixes dry pre-blended materials, such as homogeneous cementitious combinations of dry sand, cement, Lime, color pigments, etc., packaged in large bulk bags for use at a remote construction site. The bulk bag is lifted by a removable rack having plural lift eyes and the combination is positioned over a height adjustable frame. The granular material is then discharged into a continuous mixer having a dynamic input mixing stage, an output dry-to-wet mixing stage, and a transition stage therebetween. The entire assembly (bulk bag, frame and continuous mixer) is portable and can be lifted such as by a forklift to the height of a masonry scaffold for dispensing the mixed, wet granular material directly to the point of use. The apparatus allows the continuous mixer and its discharge tube to rotate to facilitate dispensing of the material directly to the point of use. g a reflected beam; and e) the polarizing beam splitter being oriented at an angle with respect to the modulated beam such that the modulated beam strikes the first surface of the transparent substrate at an angle and the reflected beam is directed away from the transmissive array; and f) a screen, located in either the reflected beam or the transmitted beam, for displaying the encoded image information. 2. A system in accordance with claim 1, wherein: a) the first polarizer further includes a first polarizing beam splitter, located in the light beam, the first beam splitter comprising: 1) a transparent substrate having a first surface located in the light beam, and 2) a generally parallel arrangement of thin, elongated elements supported by the substrate, the arrangement being configured and the elements being sized to interact with electromagnetic waves of the light beam to generally (i) transmit light through the elements which has a polarization oriented perpendicular to a plane that includes at least one of the elements and the direction of the incident light beam, defining a first polarized transmitted beam, and (ii) reflect light from the elements which has a polarization oriented parallel with the plane that includes at least one of the elements and the direction of the incident light beam, defining a first polarized reflected beam; and b) the transmissive array being located in either the first polarized reflected beam or the first polarized transmitted beam. 3. A system in accordance with claim 1, wherein the polarizing beam splitter is oriented with respect to the modulated beam at an incident angle between approximately 0 to 80 degrees. 4. A system in accordance with claim 1, wherein the polarizing beam splitter is oriented with respect to the modulated beam at incidence angles greater than 47 degrees or less than 43 degrees. 5. A system in accordance with claim 1, wherein the light beam has a useful divergent cone with a half angle between approximately 12 and 25 degrees. 6. A system in accordance with claim 1, wherein the polarizing beam splitter is used at an F-number less than approximately f/2.5. 7. A system in accordance with claim 1, wherein the polarizing beam splitter has a throughput of at least 50% defined by the product of the fractional amount of p-polarization transmitted light and the fractional amount of s-polarization reflected light; and wherein the s-polarization transmitted light and p-polarization reflected light are both less than 5%. 8. A system in accordance with claim 1, wherein the polarizing beam splitter has a throughput of at least 50% defined by the product of the fractional amount of s-polarization transmitted light and the fractional amount of p-polarization reflected light; and wherein the p-polarization transmitted light and s-polarization reflected light are both less than 5%. 9. A system in accordance with claim 1, wherein the polarizing beam splitter has a throughput for the light beam of at least 65%, defined by the product of the fractional amount of reflected light and the fractional amount of transmitted light; and wherein the percent of reflected light or the percent of transmitted light is greater than approximately 67%. 10. A system in accordance with claim 1, wherein: the arrangement of elements has a period less than approximately 0.21 microns, the elements have a thickness between approximately 0.04 to 0.5 microns, and the elements have a width of between approximately 30 to 76% of the period. 11. A device in accordance with claim 1, wherein the polarizing beam splitter further includes: a) a second layer, separate from the transparent substrate, having a refractive index, the elements being disposed between the transparent substrate and the second layer; and b) a plurality of gaps, formed between the elements, and having a content providing a refractive index less than a refractive index of the transparent substrate. 12. A device in accorda