Abstract: A tubular core assembly for a roll of paper or other sheet material has a hollow cylindrical core member formed of paperboard material, and an annular end member of metal or plastic material within each opposite end portion of the core member. Each end member has an outer annular surface secured to the inner annular surface of the core member and an inner annular surface shaped to receive a roll supporting chuck. Each end member also has a pair of radially-projecting lugs at diametrically opposite positions at the respective end of the tubular core assembly, the core member has a pair of lug-receiving notches at diametrically opposite positions at each end receiving the lugs of the respective end member to facilitate transmission of torque and axial chuck pressure from the end member to the core member.

Abstract: A method of making concrete from base metal smelter slag includes grinding the slag to a size within the range of from about -250 to about 425 mesh to produce ground slag cement, mixing the ground slag cement with Type 3 high early strength Portland cement in a ratio of at least about 0.5:1 by weight, and adding sand and stone to produce a concrete.

Abstract: Dispensers are provided of the type which include a flow path through which liquid must pass to leave the dispenser. After the dispenser has been actuated to dispense, the flow path then receives reverse flow as the dispenser recovers ready for the next dispensing. This reverse flow limits the possibility of dripping from the dispensing outlet. A flow controller in the flow path automatically adjusts to have little or no interference to the flow of liquid leaving the dispenser and then positions itself to slow down the rate of reverse flow into the dispenser. The dispenser is suitable for more viscous liquids.

Abstract: Apparatus for effecting gauge distribution in flattened tubular plastic film has a collapsing device for collapsing upwardly vertically moving expanded tubular plastic film to a two layer flattened condition, a first motor for rotating the collapsing device through 180.degree. in each direction from a neutral position, a first horizontal film direction reverser secured to the collapsing device for rotation therewith a first horizontal turning bar located above the collapsing device and extending substantially through the central axis, a second horizontal film direction reverser, and a second horizontal turning bar located about the first turning bar. A second motor arrangement simultaneously rotates the first turning bar through 135.degree. in each direction from a neutral position, the second film direction reverser through 90.degree. in each direction from the neutral position and the second turning bar through 45.degree. in each direction from the neutral position simultaneously with the 180.degree.

Abstract: Self-ligating orthodontic brackets comprise a spring ligating member of U-shape with converging arms movable on the bracket body between slot open and closed positions; in the latter position the spring retains an arch wire in the slot and urges the bracket and wire to their optimum relative positions. The ligating member is of a superelastic shape recovery metal alloy, preferably of thickness from 0.20 mm (0.008 in) to 0.25 mm (0.010 in), with rounded edges. At least the lingual portion of the member to be stiffer than the remainder; at least a part of the occlusal portion can also be stiffer. Alternatively, or in addition, the bracket body has a large mesial distal extending bore between and spaced from the bracket occlusal, lingual and labial surfaces and the arch wire slot occlusal surface. The large bore accepts attachment members used for attachment of a range of auxiliaries, such as hooks and traction springs.

Abstract: A vegetable peeling and shaping machine has a preliminary cutting assembly for cutting off portions of a vegetable to produce a vegetable core insertable into a tube, and a main cutting assembly with a tube positioned to sequentially receive vegetable cores from the preliminary cutting assembly. A reciprocable plunger is operable to push the vegetable cores sequentially through the tube, the tube having a series of circumferentially spaced shaped slots therein, and a series of reciprocable non-rotatable cutter blades is circumferentially spaced around the tube. The cutter blades are shaped correspondingly to the slots in the tube and are movable from a position exterior to the tube through the slots into the tube to cut a vegetable core to form a vegetable product of the desired shape.

Abstract: Acoustic and thermal insulation for an enclosed space, particularly the passenger cabin of an aircraft, comprises insulating elements lining the interior wall. Each element is enclosed in a bag of thin flexible moisture impervious material and each bag is provided with an aperture at a lowermost point at which moisture condensed from humid air within the bag will pool under gravity. A duct connects each element interior to the exterior of the enclosed space, so that air pressure in the bag can be equalised with that in the space without using air from the enclosed space. Any condensate in the bag can flow to the exterior, and only air from the exterior can enter the bag interior. The elements are formed in appropriate shapes, such as rectangular to fit in the cells formed between the frames and stringers of an aircraft fuselage, or so as to be wrapped around the frames.

Abstract: An internal cooling air supply assembly has a lower annular member mountable on an annular die so as to be within extruded tubular plastic film as the film leaves the die. An intermediate annular member is positionable above the lower annular member with an air removal chimney extending upwardly therethrough, the intermediate annular member forming a first chamber with the lower annular member and having an annular lower edge spaced from and co-operating with an annular upper edge of the lower annular member to form a first cooling air outlet from the first chamber. The intermediate annular member has a transfer passage for transferring cooling air from the first chamber to the interior of the intermediate annular member.

Abstract: An adjustable attachment has been developed which can be used in combination with an auxiliary backrest to suspend the backrest from a fixed backrest normally found on a chair or wheelchair. The support structure includes an elongate receiver and a hanger. The receiver extends longitudinally and is normally fixed in a vertical position to the auxiliary backrest and defines a plurality of openings spaced apart along the length of the receiver to form a row of openings. The hanger is shaped to fit in any one of the receiver openings and the receiver has an outer part so that in use the hanger can be engaged through a selected one of the openings. The hanger then extends along the length of the receiver and the outer part can be engaged downwardly over an upper edge of a fixed backrest or other support.

Abstract: An internal cooling air supply assembly is provided for supplying cooling air to the interior of an extruded tubular plastic film after the film has been extruded from an annular die at an elevated temperature. The air supply assembly has a lower annular member mountable on an annular die so as to be within extruded tubular plastic film as the film leaves the die, the die having an air supply passage to supply cooling air to the interior of the lower annular member and an air removal passage including an air removal chimney extending upwardly from the die through the lower annular member to remove air from the interior of the tubular plastic film. Intermediate and first upper annular members are positionable above the lower annular member with the air removal chimney extending upwardly therethrough.

Abstract: The invention provides an improved frame for a hacksaw blade. The frame has a handle member and a frame member coupled together and defining a pair of aligned star shaped openings. Blade attaching components are releasably engaged in the respective openings for carrying a hacksaw blade. In the preferred embodiment the attaching components can be engaged in any one of eight angular positions, and the attaching components preferably includes curved portions to offset a hacksaw blade from the star shaped openings whereby the hacksaw can be used to cut through an item down to a supporting surface and also, with some adjustment to flush out an item projecting from a surface.

Abstract: A neck support for supporting the head and neck of a person lying on their back on a supporting surface has a support member having an upper surface which, when the neck support is located on the supporting surface below the head and neck of a person lying on their back thereon, extends upwardly and rearwardly from the supporting surface to engage the back of the person's head and neck to position the head and neck at an angle to the horizontal in the range of from about 40.degree. to about 50.degree.. The upwardly and rearwardly extending surface is transversely inwardly curved to receive the back of the person's neck.

Abstract: A reinforced elastomeric non-hoop ligature comprises a thin flat body of the elastomeric material having incorporated therein a thin flat rigid insert of gingival-occlusal dimension greater than the corresponding dimension of the arch-wire receiving slot of the orthodontic bracket with which it is employed. The ligature body has holes or slots through which ligature retaining projections of the bracket body protrude, and when mounted on the bracket the rigid member straddles the bracket slot mouth. A reinforced hoop ligature comprises a torus of the elastomeric material with two diametrically opposed rigid inserts of gingival-occlusal dimension sufficient to straddle the bracket slot.

Abstract: An angularly adjustable backrest mounting assembly for a seat, has an upper transverse member securable at opposite ends to transversely spaced uprights of a seat so as to be angularly movable about a horizontal axis, and a lower transverse member is securable at opposite ends to the transversely spaced uprights below the upper transverse member. An upright member is secured adjacent an upper end thereof to the upper transverse member and adjacent a lower end thereof to the lower transverse member, and a transverse angle retaining member pivotably secured at opposite ends to opposite ends of the upper transverse member is adjustably securable at different heights to the upright member to enable the upper transverse member and the upright member to be retained in the different angular positions. The upright member has attachments to enable a backrest to be secured thereto.

Abstract: A seat cushion assembly has a lower layer of resilient shape-retaining material with an upper surface having a pair of adjacent parallel channel-shaped recesses extending rearwardly from a front end of the cushion assembly and shaped to conform to the undersides of the thighs of a sitting person. The upper surface also has a rear recess in a rearward and intermediate area positioned to be beneath the buttocks of the sitting person. An insert of relatively firm deformable material is located in the rear recess of the lower layer, and an upper layer of soft material covers the lower layer and the insert. The upper layer has channel-shaped recesses conforming with the channel-shaped recesses in the lower layer and a buttock-receiving recess over the insert. The insert serving to accommodate ischial tuberosities of the sitting person and prevents the ischial tuberosities from bottoming out through the cushion assembly. The insert also provides an even distribution of forces over these bony areas.