Abstract: A low fluid pressure dual-sided fiber entangling method and apparatus for manufacturing a nonwoven fabric. A fibrous starting material whose individual fibers are capable of movement relatively to one another under the influence of applied fluid forces is subjected to coacting opposed fluid streams while being confined between a flexible screen belt and a rigid perforated hollow drum. The fibers of the starting material are entangled under the effect of fluid forces applied in opposition, forming a reticular network which defines a pattern of blind holes, each hole extending transversely to the fabric plane and containing a protuberant fiber packing at a closed end thereof.

Abstract: A method for manufacturing a non-woven fabric printed with a decorative pattern. A fibrous starting material whose individual fibers are capable of movement relatively to one another under the influence of applied fluid forces is subjected to a fluid stream for entangling the fibers to form a unitary fibrous network. The unitary fibrous network is impregnated with liquid binder which solidifies and consolidates the non-woven fabric. Before the binder has cured and is still in a liquid condition, the unitary fibrous network is printed with a decorative pattern. Subsequently, the unitary fibrous network is dried to simultaneously cure the binder and the colorant forming the decorative pattern.

Abstract: A three-dimensional non-woven fabric with a thermally activated adhesive surface well suited for use as a facing fabric for covering a fibrous mat. The fabric comprises two adjoining fiber layers, namely an adhesive layer including bond-forming fibers fusible at a predetermined temperature and a facing layer of fibers having a considerably higher melting temperature than the bond-forming fibers. The fibers of both layers are mechanically engaged one with another and are arranged flat-wise in bundles interconnected at junctures by protuberant fiber packings disposed in a staggered relationship throughout the fabric. Bond-forming fibers are concentrated in the apex portions of the fiber packings to form the thermally activated adhesive surface. The invention also extends to a process for manufacturing the three-dimensional non-woven fabric, based on the so-called "rosebud" technique for producing foraminous webs.

Abstract: A three-dimensional non-woven fabric with a thermally activated adhesive surface well suited for use as a facing fabric for covering a fibrous mat. The fabric comprises two adjoining fiber layers, namely an adhesive layer including bond-forming fibers fusible at a predetermined temperature and a facing layer of fibers having a considerably higher melting temperature than the bond-forming fibers. The fibers of both layers are mechanically engaged one with another and are arranged flat-wise in bundles interconnected at junctures by protuberant fiber packings disposed in a staggered relationship throughout the fabric. Bond-forming fibers are concentrated in the apex portions of the fiber packings to form the thermally activated adhesive surface. The invention also extends to a process for manufacturing the three-dimensional non-woven fabric, based on the so-called "rosebud" technique for producing foraminous webs.

Abstract: A low fluid pressure dual-sided fiber entangling method and apparatus for manufacturing a nonwoven fabric. A fibrous starting material whose individual fibers are capable of movement relatively to one another under the influence of applied fluid forces is subjected to coacting opposed fluid streams while being confined between a flexible screen belt and a rigid perforated hollow drum. The fibers of the starting material are entagled under the effect of fluid forces applied in opposition, forming a reticular network which defines a pattern of blind holes, each hole extending transversely to the fabric plane and containing a protuberant fiber packing at a closed end thereof.

Abstract: A three-dimensional non-woven fabric with a thermally activated adhesive surface well suited for use as a facing fabric for covering a fibrous mat. The fabric comprises two adjoining fiber layers, namely an adhesive layer including bond-forming fibers fusible at a predetermined temperature and a facing layer of fibers having a considerably higher melting temperature than the bond-forming fibers. The fibers of both layers are mechanically engaged one with another and are arranged flat-wise in bundles interconnected at junctures by protuberant fiber packings disposed in a staggered relationship throughout the fabric. Bond-forming fibers are concentrated in the apex portions of the fiber packings to form the thermally activated adhesive surface. The invention also extends to a process for manufacturing the three-dimensional non-woven fabric, based on the so-called "rosebud" technique for producing foraminous webs.

Abstract: There is disclosed a mechanically powered tool comprising a crimping device capable of shearing tines out of an angle-bar used for protecting a corner formed by two wall panels and driving the tines into the panels for fixing the angle-bar thereto; the crimping device including a rectilinearly reciprocable actuating rod movable in a working stroke. Operatively connected to one end of the actuating rod to displace it in its working stroke is a follower block of a movement-transforming device, which block is made to be displaced in a rectilinearly reciprocable motion; the transforming device further having a rotary input section. Connected to the latter is a rotary shaft of a single-revolution clutch which further has a rotary input section operatively connected for its rotation, to a rotary output member of a power assembly.

Abstract: An attractant such as an ultra-violet light is reflected from the trap and insects are thereby attracted and fly through a surrounding mesh to inside the trap. They are then stimulated by a high frequency electro-static field generated by an electronic unit within the trap, to fly towards an electrocuting grid. When an insect enters the grid, a high voltage short duration arc is struck which rapidly heats and dehydrates the insect thus killing same. This can be accomplished either with or without actual contact of the insect across the grid. The arc dissipates a fixed charge generated by the unit so that continuous arcing does not occur. Because of the dehydration effect, the insects drop from the grid and do not stick thereto. The electronic circuit is designed so that if a relatively large insect enters the grid, and the dehydration is not completed by the arc, dielectric heating will occur as a result of the moisture remaining thus completing the dehydration process.