A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a first sealing zone, and an adjacent weakening zone. The weakening zone may be a heated perforator, includes a heating wire, or be disposed to create an auxiliary sealed area. The heating wire can have connected thereto, a source of power that is an adjustable voltage or magnitude, and/or pulsed, and/or a feedback loop. The heating wire ay be an NiCr wire and make intermittent contact with the web and be disposed in an insert. The weakening zone may create a line of weakness that is uniform or varies in intensity, is a separating zone, or includes a heat film, a toothed blade, a row of pins, a source of air, or a source of vacuum. The sealing zones ma include temperature zones, cartridge heaters, cooling air, or hated air, or a source of ultrasonic, microwave or radiative energy.

A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a first sealing zone, and an adjacent weakening zone. The weakening zone may be a heated perforator, includes a heating wire, or be disposed to create an auxiliary sealed area. The heating wire can have connected thereto, a source of power that is an adjustable voltage or magnitude, and/or pulsed, and/or a feedback loop. The heating wire ay be an NiCr wire and make intermittent contact with the web and be disposed in an insert. The weakening zone may create a line of weakness that is uniform or varies in intensity, is a separating zone, or includes a heat film, a toothed blade, a row of pins, a source of air, or a source of vacuum. The sealing zones ma include temperature zones, cartridge heaters, cooling air, or hated air, or a source of ultrasonic, microwave or radiative energy.

The invention is related to a cost-effective method for making a silicone hydrogel contact lens having a crosslinked hydrophilic coating thereon. A method of the invention involves autoclaving, in a sealed lens package, a silicone hydrogel contact lens having a base coating of polyacrylic acid thereon in an aqueous solution in the presence of a water-soluble, crosslinkable hydrophilic polymeric material having epoxide groups, for a period of time sufficient to covalently attach the crosslinkable hydrophilic polymeric material onto the surface of the silicone hydrogel contact lens through covalent linkages each formed between one epoxide group and one of the carboxyl groups on and/or near the surface of the silicone hydrogel contact lens.

Provided are a cylindrical base, a master and a method for manufacturing a master enabling a uniform transfer of a fine pattern. A cylindrical base of a quartz glass having an internal strain in terms of birefringence of less than 70 nm/cm is used. A resist layer is deposited to an outer circumference surface of this cylindrical base, a latent image is formed on the resist layer, the latent image formed on the resist layer is developed and the pattern of the developed resist layer is used as a mask for etching to form a structure including concaves or convexes arranged in a plurality of rows on the outer circumference surface of the cylindrical base.

A spectacle lens manufacturing system includes resin material filling means which fills a lens mold with a lens material (heat-curable resin material), and at least a portion of the lens mold is formed by a three-dimensional printer. The lens mold includes a front lens mold having a rear surface that defines a front surface of a spectacle lens, a rear lens mold having a front surface that defines a rear surface of the spectacle lens, and a side peripheral lens mold having an inner surface that defines a side periphery of the spectacle lens. The side peripheral lens mold is formed by the three-dimensional printer.

An impression chamber (1) for a 3D printer (6) adapted to receive a high performance plastic filament (19) and including a print head (7) and a printing bed (8), wherein the impression chamber (1) includes a thermally insulated plate (2) and a polyimide film (3) attached to the plate (2) for delimiting a printing space (20). The plate (2) is dimensioned to have a surface (2a) equal or larger than the major surface of the piece (5) to be printed, and the film (3) is dimensioned to surround the printing bed (8). The plate (2) is provided with a first through-hole (15) for allowing the passage of at least part of the print head (7), so that the plate (2) is moved by the movement of the print head (7) and the film (3) is dragged by said movement providing a flexible impression chamber (1).

A glass-polymer laminate structure includes a flexible glass substrate having a thickness of no more than about 0.3 mm. A polymer layer is laminated to a surface of the flexible glass substrate having a coefficient of thermal expansion (CTE) that is at least about 2 times a CTE of the flexible glass substrate. The polymer layer is laminated to the surface of the flexible glass substrate after thermally expanding the polymer layer to provide the flexible glass substrate with an in-plane compressive stress of at least about 30 MPa along a thickness of the flexible glass substrate.

The present invention discloses an anti-blue light anti-infrared resin lens having a refractivity of 1.50, and a preparation method thereof. The lens comprises 100 parts by weight of CR39 resin monomer, 0.5-5 parts by weight of an initiator, and 1.0216-30.6 parts by weight of an additive, where the additive includes an anti-infrared absorber, a blue light absorber, and a hardness modifier at a weight ratio of 0.0005-0.5:0.001-10:1-10, the initiator is benzoyl peroxide, dicumyl peroxide, or 1,1-di-tert-butylperoxy-3,3,5-trimethylcyclohexane. The resin lens prepared in the present invention has both blue light absorption effect and near-infrared absorption effect and is capable of being dyed as needed to have the effect of sunglasses, while the quality of the lens is guaranteed. The resin lens is a new type of multifunctional resin lens.

A laser joining method and device includes a pressure-applying clamping device, which presses a first and a second workpiece against one another at least after the workpieces have been locally plasticized, and a mask having mask structures, which allow laser light to pass only in the region of the bonding contact faces, wherein at least the workpiece facing the laser source is formed by a three-dimensional molded part, which is not planar at least on the first contour side facing the clamping element and/or on the second contour side facing the second workpiece, and wherein the clamping element, with the bearing side thereof for the first workpiece, is adapted to the first contour side of the first workpiece. The mask structures are created on the bearing side of the clamping element facing the first workpiece or on the second contour side of the first workpiece facing the second workpiece.

A laser joining method and device includes a pressure-applying clamping device, which presses a first and a second workpiece against one another at least after the workpieces have been locally plasticized, and a mask having mask structures, which allow laser light to pass only in the region of the bonding contact faces, wherein at least the workpiece facing the laser source is formed by a three-dimensional molded part, which is not planar at least on the first contour side facing the clamping element and/or on the second contour side facing the second workpiece, and wherein the clamping element, with the bearing side thereof for the first workpiece, is adapted to the first contour side of the first workpiece. The mask structures are created on the bearing side of the clamping element facing the first workpiece or on the second contour side of the first workpiece facing the second workpiece.