US 6,719,609 B2Granted

Eyeglass lens processing apparatus

AssigneeNidek Co., Ltd.

InventorsToshiaki Mizuno, Shinji Koike

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Abstract

An eyeglass lens processing apparatus for processing a periphery of an eyeglass lens, includes: a lens rotating shaft which holds and rotates an eyeglass lens to be processed; an abrasive wheel rotating shaft movable between a retracted position and a processing position; a chamfering abrasive wheel which is attached to the abrasive wheel rotating shaft and which chamfers the lens while receiving a processing load from the lens during processing; a detecting unit which detects the load to the chamfering abrasive wheel; and a control unit which issues a control signal for relatively moving the lens and the chamfering abrasive wheel one from another to reduce the processing load if the detected processing load is higher than a predetermined first level and for continuing the chamfering, and which issues a control signal for ending the chamfering if the detected processing load over the entire periphery of the lens is lower than a predetermined second level.

Claims4

Dependent claims

An eyeglass lens processing apparatus for processing a periphery of an eyeglass lens, comprising:

a lens rotating shaft which holds an eyeglass lens to be processed through a cup holder and a lens retainer and rotates the lens;
an abrasive wheel rotating shaft;
a chamfering abrasive wheel which is attached to and is rotated by the abrasive wheel rotating shaft and which chamfers the lens;
a moving unit which applies a processing pressure between the lens and the chamfering abrasive wheel by relatively moving the lens and the chamfering abrasive wheel one from another;
a detecting unit which detects a processing load to at least one of the lens and the chamfering abrasive wheel;
and
a control unit which issues a control signal for reducing the processing load lower than a predetermined first level if the detected processing load is higher than the first level and for continuing the chamfering, and which issues a control signal for ending the chamfering if the detected processing load over the entire periphery of the lens is lower than a predetermined second levels,
wherein the first level is a level representing a processing load which is generated when a part of the cup holder or the lens retainer is processed.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/842,642Filed 27 Apr 2001
Priority: JP P2000-13433528 Apr 2000
Published: US 2002/0022436 A121 Feb 2002
Granted: 13 Apr 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

B24B 9/148
Of optical work, e.g. lenses, prisms: electrically, e.g. numerically, controlled
B24B 19/03
For grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements: for grinding grooves in glass workpieces, e.g. decorative…
B24B 49/16
Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring…
B24B
Machines, devices, or processes for grinding or polishing