The present invention overcomes all of these problems.
If each bottle from a particular mold is to be discarded, a person must memorize the complex pattern in which a particular molds products will be distributed across the width of an annealing lehr and discard bottles based on this pattern. However, the method therein disclosed is limited as to the number of molds which may be identified, since each bump that is measured is counted as 1, the total number of bumps being added to obtain the mold number.
As may be appreciated, this procedure frequently results in the discard of some good bottles while allowing defective ones to pass, since confusion as to the pattern is common. It should be clear that the number of individual molds which may be identified is thus sharply restricted by the number of bumps which can be placed in the bottle bottom.
Suitable electronic circuitry is then provided to decode the pattern of dark spots and present the mold number of a bottle in the station as a digital output.
There are also provided photocells sensitive to the general level of ambient light falling on the reading device.
That is,a particular mold, of a plurality of molds, will tend to continue to produce a particular defect once the conditions are present to create the defect.
It is thus necessary to determine which mold out of multiple molds is producing a defective bottle so that corrective measures may be taken.2 is a sectional view, on an enlargedscale, taken at line 22 of FIG. 3 is an exploded view of the optical system of FIG. 4 is a bottom view of a container showing the identifying indicia; FIG.5 is a top plan view of the photocell read-out device; FIG.Apparatus and method for determining which of a plurality of molds produced a particular bottle and a bottle coded in a manner suitable for identification by the apparatus of the invention.A non-digital identification code is molded into a bottle while it is formed in a mold. [ 5 7 ABSTRACT Apparatus and method for determining which of a plurality of molds produced a particular bottle and a bottle coded in a manner suitable for identification by the apparatus of the invention.The reading is accomplished in the following manner: The bottle is held stationary and a beam of light is directed through the upper portion to uniformly illuminate the bottom of the container which contains the coded information.