Showing papers by "3M published in 1969"

Propenone sensitizers for the photolysis of organic halogen compounds

Abstract: Photosensitive compositions containing non-basic propenone compounds as sensitizers for photolyzable organic halogen compounds, and image recording elements in which at least one layer contains such photosensitive compositions.

Adhesive bandage and envelope

Abstract: A packaged adhesive bandage comprising an adhesive bandage and an envelope therefor, said bandage including a backing strip having a tacky adhesive coating on one surface thereof with a dressing pad adhered to the backing strip generally centrally of said one surface, a first package panel having a low adhesion surface contacting said adhesive-coated surface of said bandage and extending beyond the peripheral edges of said bandage, the narrow strip of material having opposed ends and an intermediate adhesive-coated area on one surface, said intermediate adhesivecoated surface being placed in contact with the surface of said backing strip opposite the said one surface coated with said tacky adhesive, said opposed ends of said strip of material lying parallel with said backing strip, and a second package panel overlying said adhesive bandage and said strip of material and extending beyond the peripheral edge portions of said bandage and being secured to said first package panel.

Apparatus for dispensing thermoplastic material

Abstract: A thermoplastic material-dispensing apparatus of the type wherein solid thermoplastic adhesive material is melted in a heated well and is dispensed from the apparatus due to force exerted on the molten material by means of a piston. The apparatus comprises a loading chamber which comprises an intermediate barrel section and a magazine. The intermediate barrel section is situated between the heated well and a piston chamber which houses the piston. The magazine is adapted to contain a plurality of thermoplastic adhesive slugs and to deliver the thermoplastic adhesive slugs to the intermediate barrel section when the intermediate barrel section is empty.

Textile Characteristics Affecting the Release of Soil during Laundering1 Part II: Fluorochemical Soil-Release Textile Finishes

Abstract: The behavior of fluorochemical surface finishing agents is examined with reference to several of the parameters which govern the ease with which soil is removed from textiles by laundering. Special...

Textile Characteristics Affecting the Release of Soil during Laundering1: Part I: A Review and Theoretical Consideration of the Effects of Fiber Surface Energy and Fabric Construction on Soil Release

Abstract: The efficiency of a given laundering process in effecting soil release from textiles is a complex function of the nature of the soil, the manner in which the soil was originally distributed in the ...

Process of making colored high temperature polymers

Abstract: High melting polymers such as polyester, polyamide or polysulfone are uniformly internally colored by blending therewith a minor amount of easily colored lower-softening thermoplastic additive polymer such as polyethylene, containing an effective amount of coloring material uniformly blended therethrough High temperature polymers colored in this manner provide shaped articles such as films, fibers, and machine parts having a visually uniform color

Developer powder supply

Abstract: A developer powder supply package in which a removable strip is secured to converging sidewalls to cover a powder discharge opening formed in the cover of a container which also has a body formed with an elongated recess for mating with a dispensing carriage extending across the exterior surface of its base. A dispensing carriage provides support for the supply package over an area into which it is desired to dispense the developer powder and is rotatable to support the package in an inverted position to dispense the developer powder from the container through the discharge opening after the strip has been removed.

Original document feeder with registering gate and movable platen

Abstract: An original document feeding attachment for a reproducing machine having a exposure station including a transparent supporting member in which a registering member is adapted to be positioned over the exposure station of the reproducing machine to define therewith a portion of a guide path between a document supply tray and a document receiving tray. The attachment includes a feeder for removing one document at a time from a stack of documents in the supply tray and transporting the document to a position beneath the registering member. Means are provided for registering the removed document with the exposure station and registering member including a registration gate movable relative to the registering member into and out of the document guide path to obstruct the document guide path. The document may then be carried to the receiving tray when the machine has completed the necessary exposures.

Voltage-controlled oscillator

Abstract: The disclosure is directed to a voltage-controlled oscillator using a pair of integrators coupled to a pair of voltage comparators and wherein the outputs of the voltage comparators control a flip-flop. The output from the flip-flop is used to alternately control the individual ones of the integrators to operate in response to an analog input signal so as to produce an output signal from the flip-flop which has a frequency in accordance with the input signal to the integrators. In addition, the invention includes the use of a feed forward signal which is coupled to the comparators to control the time of operation of the comparators to compensate for fixed delays in the system.

N-aroyl sulfonamides

Abstract: N-Aroylperfluoroalkanesulfonamides wherein the perfluoroalkane group is methyl or ethyl and the aryl group is phenyl, naphthyl, pyridyl, thienyl, furyl, or pyrazinyl, optionally substituted, and their pharmaceutically acceptable salts, are active anticonvulsant agents. Processes for the preparation of these compounds are described.

Reactivities in olefin-difluorocarbene reactions

Abstract: The relative rates of addition of difluorocarbene to a series of methyl-substituted olefins have been determined and correlated with similar data for dichlorocarbene, chlorofluorocarbene and ground-state oxygen atoms. The electrophilic nature and stabilization of difluorocarbene by the fluorine substituents is discussed. Relative activation energies for the difluorocyclopropane-forming reaction have been estimated and correlated with properties of the olefins as derived from molecular orbital theory.

Sheet collation distributor

Abstract: A collation distributor for use with a document copying machine which distributor is adapted to receive and collate the copies of the document made by the machine and receive the original sheets of the document. The distributor comprises a plurality of trays for receiving the copies, means for directing the copies of each original sheet seriatim into the trays, and control means for resetting the sheet-directing means with relation to the trays in response to the discharge of each successive original sheet of the document from the copying machine prior to commencement of the next run.

Conductor identification in multiconductor means

Abstract: This specification discloses an improvement in method and apparatus for identifying at a remote position conductors in a multiconductor means having the conductors identified at one end. The improvement is characterized by sequentially stepping by control signals from the remote position a sequential stepping switch onto contacts to which the identified conductors at the one end are connected, until a specifically identified conductor is connected with the sequential stepping switch. Thereafter, an identifiable signal is put on the specifically identified conductor and the conductor carrying the signal at the remote position is identified. The invention is particularly described with respect to repairing a telephone cable, or reconnecting groups of wire pairs from one cable to another in a telephone line system. In such telephonic work, ordinarily, it is advantageous to employ a second sequential switching device in conjunction with the sequential stepping switch to be able to monitor a pair of conductors, or wires, and to thereafter check out each individual wire of the pair. Also, disclosed is a field monitor unit to assist the repairman in maintaining a record of the particular conductor onto which the sequential stepping switch has been actuated. Other aspects are also described; such as, a flip-flop mode of operation in which correlated pairs of wires in a multiwire cable are identified for immediate changing of wires in a group with consequent lessening of chance of error.

Heat-shrinkable film and tubing

Abstract: Heat-shrinkable films and heat-shrinkable tubing of linear polymeric esters that shrink at least 21/2 times as much along one of the longitudinal and transverse axes of the films and tubing as they do along the other. The films and tubing shrink between 2 and 20 percent in the direction of least shrinkage and at least 20 percent in the direction of most shrinkage. A film of the invention is prepared by stretching it in a first direction at a temperature that is above the second order transition temperature for the polymer of the film, then thermally conditioning the film while it is in the stretched condition by heating it for several seconds at a temperature that is at least 5 DEG C. above the first temperature, and then stretching the film in a second direction perpendicular to the first direction at a temperature at least 5 DEG C. above the first temperature.

Block-grinding apparatus

Abstract: A grinding apparatus wherein a block to be abraded is transferred to and held on a constant load bed which, through pivotable connections and constant force fluid cylinders, maintain said block in engagement with an abrasive material and pivotably accommodates varying geometric shapes of blocks in order to control the grinding depth over the facial surface and thus minimize the removal of material required to permit all portions of a facial surface, although possibly irregular, to be abraded to at least a predetermined grinding depth.

Gripping device and method of making

Abstract: A gripping device useful in mounting a wheel on a shaft and for other purposes comprising a ringlike array of resiliently interconnected platelike wedge-shaped blades having slotted end extensions, in combination with a thrust ring for applying force to said array at said extensions and in an axial direction.

Adhesive compositions comprising aromatic process oil and block copolymer

Abstract: Adhesive compositions useful on sealing-strips for highways and for other purposes comprise high boiling viscous aromatic process oils fortified with minor amounts of styrene-diene block copolymer.

Method of making a closed end tube

Abstract: A metallurgically integral tube of shaped sintered powdered metal having at least one end closed. A green structure of the tube is formed by first extruding a clay-like mixture of powdered metal and a heat fugitive binder into the shape of a tube, then extruding from said mixture a rod-like plug and inserting the plug into the end of the tube. The closed-end green structure can also be made by causing the tubular extrusion output to converge against a plate, thereby closing the end of the tube. The shaped green structure is then sintered in a reducing atmosphere to produce the closed end, integral tube.

Torque-transmitting member

Abstract: A torque-transmitting member in which a plurality of short stiff normally straight fibers are secured to and randomly spaced on a planar surface of a flexible backing. Each fiber has one end secured to the planar surface and extends therefrom at an acute angle less than about 45* and generally perpendicular to a radial line on the planar surface intersecting the secured end of the fiber.

Semi-rigid paneling

Abstract: A laminate preferably consisting of a 25-250 mil-thick sandwich having a microsphere-filled elastomeric core (derived from a hollow, particulate filler and an elastomer such as polyurethane with a stress at 100 percent elongation of 500-4,000 psi) and two 1-10 mil high tensile-strength (stress at 2 percent elongation above 10,000 psi) skins provides a paneling material with, for example, good corrosion and impact resistance. The hollow, particulate filler loading is 20-65 volume percent of the core; and the flexural composite modulus of the sandwich-type laminate is in the range of 0.5-4 X 105 psi; and the density can range from about 0.5 to about 1.0 g./cm3. These laminates have a wide variety of constructional, decorative, and insulative uses. Somewhat stiffer and thicker laminates can be provided by using more than one core alternating with a plurality of skins.

Article positioning and control mechanism

Abstract: An apparatus for registering articles releaseably adhered to a liner with a predetermined station for printing, punching, dispensing, etc. The apparatus includes a movable article guideand registering-member comprising spaced transversely extending blades engageable with the strip of articles and positioned a predetermined distance from said station such that upon movement of the articles toward said predetermined station and movement of said registering member a predetermined extent the desired position of the articles relative to the station may be readily maintained.

Disposable reserve cell with encapsulated electrolyte

Abstract: A disposable reserve cell for the production of an electrical current in which the aqueous electrolyte is contained in a multiplicity of small capsules The cell is activated by rupturing a substantial portion of the capsules thereby releasing the electrolyte

Microfilm reader printer

Abstract: This invention is a low-cost microfilm reader printer which uses sheet form print material. The invention utilizes a sheet-feeding mechanism having a compressible dispensing roll in contact with one end of a stack of sheet print material, and a guide-disposed adjacent the periphery of the roller. When rotated, the dispensing roller separates sheet in the stack and feeds successive sheets between the roller and the guide approximately 180* around the roller and directs the dispensed sheet to an exposure station above and parallel to the storage area. Subsequent to exposure, the exposed sheet is advanced to a developer.

End of tape sensing apparatus

Abstract: Apparatus for deactivating a web transporting mechanism in response to retardation in the movement of a web. The retarded movement of the web is sensed by rotation of a spindle associated with a spool contacting the web and the rotation of the spindle relative to a continuously rotatable member drives a sensing member to maintain the sensing member in a first position when the web is normally transported and to drive the sensing member to a second sensing position when the web movement is retarded. Upon movement of the sensing member the web transporting mechanism is deactivated.

Ultrasonic intrusion detection system signal processing circuit

Abstract: An electronic device for processing the amplitude modulations of a received ultrasonic carrier wave to produce an alarm signal when the pattern of the amplitude modulations is characteristic of an alarm condition. The device produces an electrical signal which is representative of the amplitude modulations of a received wave. When the electrical signal has a frequency within a predetermined pass-band, is of at least a predetermined amplitude, and persists for a minimum time interval, an alarm signal is produced.

Preparation and Curing of Poly (Perfluoroalkylene Oxides)

Abstract: A series of functionally terminated poly(perfluoroalkylene oxides), a new class of curable, liquid, fluorinated polymers, has been prepared by the photopolymerization of perfluorooxydipropionyl fluoride, O(CF2CF2COF)2, and related perfluoroacyl fluoride monomers Polymerization proceeds by ultraviolet-induced scission of CF2COF groups and coupling of the CF2—radicals thus formed Polymer molecular weight and functionality increase with photolysis time The acid fluoride-terminated polymers (Mn 1000–5000, functionality 2–5) are liquids possessing low Tg (about −60°C) and excellent, thermal stability Other functional end groups (eg, COOH, COOR, CH2OH, etc) have been prepared using standard reactions

Programmed traffic signal and method of using

Abstract: A signal or display device comprising a condensing lens, aperture means having all aperture-defining edges located substantially at the focus of the lens, and a light source for providing diffuse illumination to the lens from the focus and from the entire aperture, contains a moveable filter member for interposing between source and lens and located substantially at said focus.

Sheetlike material, the method of storing an image consisting of differing magnetic, electrical, and optical properties

Abstract: Methods of recordation, development, and readout of information from a sheetlike storage medium having an imaging layer which includes a homogeneous mixture of a halogen-containing binder and alpha ferric oxide. The medium is recorded with an information-modulated high-energy beam, developed with heat, and read out by detecting changes in the field created by exposing the medium to a uniform field of electromagnetic energy.

N,n-disubstituted trifluoromethanesulfonamides

Abstract: By reacting N-alkyl- and N-alkenyltrifluoromethanesulfonamides with certain aroyl halides or anhydrides there are obtained Naroyl-N-alkyl- and N-aroyl-N-alkenyltrifluoromethanesulfonamides having physiological activity as anticonvulsant agents.

Method of producing a spliced pictorial

Abstract: Method of producing a spliced pictorial on transparent plastic film for application to large internally illuminated signs involving the steps of sectionalizing the pictorial, appropriately four-color printing each sectional while leaving a different two-color border on each of adjacent sectionals, and overlap splicing adjacent borders in registry to provide an inconspicious splice.