Abstract: Nonmutagenic, highly twisted derivatives of benzidine of the following formula ##STR1## useful as intermediates for the preparation of various organic pigments were obtained. The benzidine derivatives are significantly rotated about the biphenyl linkage due to bulky substituents at the R.sub.2 and/or R.sub.4 positions. Bisazomethine, disaoacetoacetanilide, disazopyrazolone, disazobenzimidazolone and disazonaphthol pigments prepared from these highly twisted benzidines exhibit hypsochromic spectral shifts relative to pigments prepared from other benzidine compounds with less twist about the biphenyl linkage, for instance, other benzidine compounds in which all four R.sub.2 and R.sub.4 represent H. Greenish-yellow, yellow, orange, red and brown pigments obtained from the twisted benzidines are nonmutagenic in the standard Ames test and Prival modification.

Abstract: In a mail inserter having a 360 degree operational cycle and a plurality of subassemblies, a computer issues a plurality of electrical control signals having predetermined rotational positions and durations within the operational cycle at a given inserter speed. Solenoids, actuators and other driving devices are responsive to the control signals to determine the operation of the subassemblies. A device measures the operation speed of the inserter, and the computer adjusts the rotational position of each control signal within the operational cycle according to the inserter speed.

Abstract: An index tab for hanging file folders that is adapted for easy affixation of self-adhesive index labels. The index tab is formed as a tab comprising sheet material having an upper portion for affixation of a self-adhesive label thereto and a lower portion adapted to be secured to a hanging file folder. The tab, in its preferred embodiment, is of a width so as to extend across substantially the entire width of a hanging file folder so that the ends thereof substantially correspond to the ends of the hanging file folder to which the tab is secured and the upper portion is angled slightly backwardly for ease of visibility.

Abstract: An improved fluid seal device or pressure seal of the type suitable for uses such as sealing an annular space between an internal surface and a member having an outer cylindrical surface is described. The seal includes a reinforced body formed of fabric reinforced rubber and at least one dynamic lip made substantially of rubber. The lip protrudes from the seal so that a small portion of the lip contiguous to the body of the seal and containing fabric reinforcement is contacted by the movable member in addition to the movable member contacting the resilient portion of the lip. The resilient portion of the lip hinges along the interface between the resilient portion and the fabric reinforced portion to control break-away frictional forces between the seal and the member.

Abstract: An apparatus and method for computerized control of a "Phillipsburg-type" mail insertion machine. The mechanical timing and drive mechanisms of the prior art inserter are replaced with a programmable computer, solenoid valves, and pneumatic cylinders, or other suitable drivers. The computer's software includes a plurality of programmed look-up tables. An operational delay look-up table includes electro-mechanical lag times for the pneumatically driven stations/sub-assemblies of the inserter. Also provided are look-up speed tables, which include start and stop angles for actuation of each of the pneumatic cylinders. A first look-up speed table includes actuation data appropriate for operation of the machine within a relatively slow range of speeds. Four additional look-up speed tables provide correct actuation data for successively higher speed groups, up to 10,000 insertion cycles per hour.

Abstract: A method of producing at least one control signal data look-up table for a mail insertion machine having a 360 degree cycle of operation and capable of variable operating speeds within a given cycle. The mail insertion machine possesses predetermined electro-mechanical lag times for extending and retracting mechanical components. The method entails creating a baseline control signal data look-up table for a first operating speed based upon pre-determined electro-mechanical lag times. The look-up table comprises a start angle and a stop angle within the 360 degree cycle of operation. The start and stop angles are then compensated for a second operating speed based upon the pre-determined electro-mechanical lag times for extending and retracting mechanical components and the first operating speed. A second control signal data look-up table is then created by writing the compensated start and stop angles that correspond to the second operating speed into the second control signal data look-up table.