Abstract:
A decorative glass sheet (100) and a method and apparatus for forming the same. The decorative glass sheet (100) includes a glass panel (100) having opposed surfaces with at least one decorative band (110) formed in at least one of the surfaces. The decorative band (110) includes a roughened band (120) which provides a frosted appearance. A remaining portion (140) of the surface is not covered by the decorative band. The decorative band contrasts with the remaining portion (140) of the surface to provide a unique visual effect including the simulation of a muntin on the glass panel (100). In preferred embodiments, one or more straight walled grooves (130) are formed in the surface parallel to and immediately adjacent the roughened band (120).
Abstract:
There is disclosed apparatus for brilliant cutting of glass comprising support means allowing a rotary cutting wheel and a glass workpiece freedom of relative movement such that the plane in which the wheel's cutting edge rotates can be tilted relatively to the glass.
Abstract:
The invention relates to a device for machining the edges of spectacle glasses, comprising a spectacle glass holder for a rough glass held on at least one side and a machining device for full machining of said glass by means of a separating cut to provide an upper facette, a peripheral groove or grooves which can be used to fasten a spectacle frame using clips or or drill holes and, optionally, to polish the machined surfaces.
Abstract:
The description relates to a device for edging a spectacle lens (1) with a supporting spindle (2) for the lens, a first spindle (4) for a set of grinding discs (3), a tool with which the rim of the edged lens (1) can be grooved and a control unit (5) setting the distance between the supporting spindle (2) and the spindle (4) for the grinding discs (3) in accordance with the angle of rotation of the lens (1). The invention is characterised in that the control unit (5), which is an electronic unit, controls the distance and axial displacement between the lens grooving tool (7) and the supporting spindle (2) independently of the grinding disc spindle (4), making use of the sets of data for edging the lens (1).
Abstract:
A wave bevelling machine is disclosed which produces a wave bevel on a glass work piece. The machine includes a feed path that is adapted to receive a glass work piece and which includes a plurality of spaced-apart treatment heads adjacent the feed path and adapted to sequentially engage the edge region of the work piece as the work piece is moved along the feed path. Each of the plurality of heads includes at least one contact region adapted to contact the edge region of the work piece, and one or more of the heads is adapted to abrade glass from the edge region when in contact with the edge region. The machine further includes a treatment head positioning system adapted to cause the contact surfaces of the plurality of heads and the edge region of the work piece to be engaged and cyclically moved in an oscillating path with respect to each other to produce the wave bevel on the edge region. The machine may further include one or more conveyors that support and move the work piece along the feed path. Furthermore the heads may be mounted on a single carriage, on which they move or are engaged as a unit, or may be independently mounted, wherein they may each be controlled and positioned by the treatment head positioning system independent of the rest of the plurality of heads.
Abstract:
A three-axis, computer controlled apparatus (10) for edging optical lenses maps the surfaces of a lens blank (L) along a path defining the shape of the lens to be cut from the lens blank and from which mapping a computer controlled cutting algorithm directs the movement of the lens in the R, Z and theta axes direction. The apparatus (10) provides rough cuts, finished cuts and automatic placement of bevels and grooves along the edge of the lens with minimal operator intervention.
Abstract:
A method of forming a recess in a surface of a substrate includes: providing an abrasive article comprising a structured abrasive member disposed along a peripheral surface of a support member, frictionally contacting the structured abrasive layer with a surface of a substrate, longitudinally advancing the structured abrasive layer relative to the surface of the substrate; and rotating at least one of the abrasive article or the substrate relative to the other around a rotational axis perpendicular to the surface of the substrate such that the structured abrasive layer maintains contact with and abrades the surface of the substrate. The structured abrasive member comprises a structured abrasive layer comprising shaped abrasive composites secured to a backing, wherein the backing is proximate to the support member. The shaped abrasive composites comprise abrasive particles retained in a binder material. The present disclosure also provides an abrasive wheel comprises a structured abrasive member disposed on a peripheral surface of a support wheel and display covers including a spherically concave recess abutting a cylindrical passage.
Abstract:
An initial position setting method for a grinding device that comprises a grinding stone (11), lens holding shafts (14, 14) capable of moving toward and away from each other along the normal direction of the grinding stone (11), a groove cutting grinding stone (23) and chamfering grinding stones (24, 25) that are movable to predetermined positions, motors (M2, P1, 55) for effecting rotation, toward-away movement, etc. of the lens holding shafts (14, 14), a driving mechanism (30) for moving the groove cutting grinding stone (23) and chamfering grinding stones (24, 25), a photosensor (57) for detecting that a work-subject lens held by the lens holding shaft (14, 14) comes into contact with the grinding stone (11), the method comprising the steps of holding a measuring prototype (70) of predetermined shape by the lens holding shafts (14, 14), moving the groove cutting grinding stone (23) and chamfering grinding stones (24, 25) to predetermined positions, moving the lens holding shafts (14, 14) until the measuring prototype (70) comes into contact with the groove cutting grinding stone (23) or chamfering grinding stones (24, 25), calculating the amount of movement of the lens holding shafts (14, 14) at this time, and effecting initial setting of the amount of movement of the groove cutting grinding stone or chamfering grinding stones on the basis of the calculated amount of movement and the size of the measuring prototype (70).
Abstract:
A lens processing device capable of performing, in one chuck, those operations ranging from a measurement to various types of processings required for spectacle lens processing and also realizing a highly accurate processing, comprising a lens holding unit (12) holding and rotating a lens (1), a cutter (131) cutting the peripheral surface of the lens in a specified cross-sectional form, an end mill (141) recessing the peripheral surface of the peripherally cut lens and chamfering the edge part around the peripheral surface of the lens, and a lens measurement unit (15) measuring the shape and position of the lens held by the lens holding unit.
Abstract:
A method of forming a recess in a surface of a substrate includes: providing an abrasive article comprising a structured abrasive member disposed along a peripheral surface of a support member, frictionally contacting the structured abrasive layer with a surface of a substrate, longitudinally advancing the structured abrasive layer relative to the surface of the substrate; and rotating at least one of the abrasive article or the substrate relative to the other around a rotational axis perpendicular to the surface of the substrate such that the structured abrasive layer maintains contact with and abrades the surface of the substrate. The structured abrasive member comprises a structured abrasive layer comprising shaped abrasive composites secured to a backing, wherein the backing is proximate to the support member. The shaped abrasive composites comprise abrasive particles retained in a binder material. The present disclosure also provides an abrasive wheel comprises a structured abrasive member disposed on a peripheral surface of a support wheel and display covers including a spherically concave recess abutting a cylindrical passage.