Abstract: A document holder for an assembly of loose leaf sheets, such as computer printouts, including a channel member provided with a slot defining a track for slidably and separably receiving at least one binder element secured to the sheet assembly, wherein the binder element is detachably snapfitted to the sheet assembly through aligned apertures formed in corresponding perforated margin portions of the sheets.

Abstract: A document holder for an assembly of loose leaf sheets, such as computer printouts, including a channel member provided with a slot defining a track for slidably and separably receiving at least one binder element secured to the sheet assembly, wherein the binder element is detachably snapfitted to the sheet assembly through aligned apertures formed in corresponding perforated margin portions of the sheets.

Abstract: An amusement device includes a number of model mice each mounted on a baseboard for movement into and out of respective enclosures on the board. A user can operate the models from beneath the board to move them back and forth, into and out of the enclosures. The device is intended to provide recreational activity for a pet owner and pet while protecting the owner's hands against inadvertent scratching or biting.

Abstract: Plant cultivation units include several tiers of cultivation beds in open baskets supported on trays extending between endless chains which couple a pair of drive pulleys to a pair of idler pulleys. The beds are driven about a generally vertical endless path at a speed sufficient to cause artifical air movement and to maintain a low air temperature differential between the top and bottom of the endless path; this permits greater vertical separation between the top and bottom of the path and greater growth area to floor area ratios. Hollow pulley shafts supply and withdraw air. A pair of pipes supply water and steam. A method of growing mushrooms includes two phases in a common housing: a pasteurization phase and a growth phase.

Abstract: A plastic drum assembly includes a preformed insert fused to at least a portion of the corner of the drum. In order to facilitate lifting and handling the drum, the insert is formed with a pair of indentations on opposite sides of a ridge. The method involves placing the preformed plastic insert across at least a portion of a corner of a mold cavity and blow molding the drum in the cavity to form the drum and fuse the drum corner to the insert. The disclosure also is concerned with methods for forming indentations in a blow molded plastic drum and with a method of reinforcing the corner of a blow molded drum.

Abstract: A plastic drum assembly includes a preformed insert fused to at least a portion of the corner of the drum. In order to facilitate lifting and handling the drum, the insert is formed with a pair of indentations on opposite sides of a ridge. The method involves placing the preformed plastic insert across at least a portion of a corner of a mold cavity and blow molding the drum in the cavity to form the drum and fuse the drum corner to the insert. The disclosure also is concerned with methods for forming indentations in a blow molded plastic drum and with a method of reinforcing the corner of a blow molded drum.

Abstract: A plastic drum assembly includes a preformed insert fused to at least a portion of the corner of the drum. In order to facilitate lifting and handling the drum, the insert is formed with a pair of indentations on opposite sides of a ridge. The method involves placing the preformed plastic insert across at least a portion of a corner of a mold cavity and blow molding the drum in the cavity to form the drum and fuse the drum corner to the insert. The disclosure also is concerned with methods for forming indentations in a blow molded plastic drum and with a method of reinforcing the corner of a blow molded drum.

Abstract: Methods in which humans or other mobile bodies are exposed to volatile tracking and marking substances, the vapors of which are detected by ionizing gaseous samples, analyzing the ions in a drift field, and detecting at least a portion of the ions.

Abstract: A light control device for a high frequency lighted fluorescent lamp includes a high frequency variable voltage power source. A first impedance element (a capacitor and inductor in series) is provided between the terminals of the lamp on the side opposite to the power source. A second impedance element (an inductor) is connected between the power source and the terminals of the lamp, and a third impedance element (a capacitor) is connected across the lamp on the power source side. A constant power source circuit supplies, upon starting of the lamp, constant power to the first impedance element to thereby apply substantially constant cathode pre-heating current and starting voltage and applies, during the lighting of the lamp, substantially constant cathode heating current. The control circuit is capable of pre-set light control. The light control device suppresses beat interference and fluorescent lamp noises due to the electric field radiated from the lamp. Rapid and instant starting is enabled.

Abstract: A sewage purification system for purifying liquid sewage containing biologically degradable solid waste material. The sewage is subjected to successive treatment steps in three basic consecutive stages during which the sewage is agitated to break up the solid waste material and encourage the proliferation of microorganisms for the digestion thereof, settled to effect separation of the purified liquid component from the residual solid waste material in suspension component with recycling of the latter, and thereafter distributed into the ground.

Abstract: Oxidation and fixing of sulfur and sulfur compounds in weak black liquor is accomplished by methods which insure minimal odorous sulfur emissions and which facilitate the collection of sulfate soaps. By critical adjustment of certain parameters substantially complete oxidation of sulfur and sulfur compounds is achieved, with maximum utilization of oxygen, while enhancing the collection of sulfate soaps and minimizing the production of foam. Various methods are disclosed for the oxygenation of weak black liquor, including the utilization of reaction columns, conical reactors, and venturis.

Abstract: Structures for providing a single sheet of material or a box formed from the sheet with a manually detachable coupon-bearing surface area. A cut in the sheet to a depth less than the thickness of the sheet defines at least part of the perimeter of the detachable area. A tab adapted to be manually engaged is cooperable with the cut for enabling the surface area to be stripped as a layer from the sheet, the area prior to stripping from the sheet being substantially integral with the underlying region of the sheet. Various embodiments are disclosed.

Abstract: A mulch comprises a paper sheet covered substantially completely on one side thereof with a water-impervious material and treated at marginal regions only of the opposite side thereof with a water-insoluble fungicide. The marginal regions of the mulch may be treated as the mulch is fed from a supply roll and laid upon the ground, with the water-impervious side facing downward. The treated marginal regions are covered with soil to anchor the mulch and to provide a long-term mulch without substantial deterioration.

Abstract: A mulch comprises a paper sheet covered substantially completely on one side thereof with a water-impervious material and treated at marginal regions only of the opposite side thereof with a water-insoluble fungicide. The marginal regions of the mulch may be treated as the mulch is fed from a supply roll and laid upon the ground, with the water-impervious side facing downward. The treated marginal regions are covered with soil to anchor the mulch and to provide a long-term mulch without substantial deterioration.