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Publication numberUS3327849 A
Publication typeGrant
Publication dateJun 27, 1967
Filing dateSep 13, 1965
Priority dateSep 13, 1965
Also published asDE1573739B1
Publication numberUS 3327849 A, US 3327849A, US-A-3327849, US3327849 A, US3327849A
InventorsSorbie Thomas B
Original AssigneeOwens Illinois Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Inspecting glass containers having rounded top finishes
US 3327849 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

June 27, 1967 B. SORBIE 3,327,849

INSPECTING GLASS CONTAINERS HAVING ROUNDED TOP FINISHES Filed Sept. 13, 1965 INVENTOR. THOMAS B. SORBI E United States Patent 3,327,849 INSPECTING GLASS CONTAINERS HAVING ROUNDED TOP FINISHES Thomas R. Sorbie, Toledo, Ohio, assignor to Owens- Illinois, Inc., a corporation of Ohio Filed Sept. 13, 1965, Ser. No. 486,616 Claims. (Cl. 209-1115) This invention relates to inspecting glass containers having rounded top finishes for defects such as vertical checks.

One of the problems encountered in the inspecting of glass containers having rounded top finishes is that when a conventional vertical check inspecting apparatus is used wherein a light beam is directed horizontally at an acute angle to a radial plane against the finish of the container, the light is redirected downwardly and inwardly of the wall of the container so that the defects are not detected. Moreover, the light which is directed upwardly through the wall of the container from optical inspection of the bottom of the container for defects tends to interfere with vertical check inspection.

It is, therefore, an object of this invention to provide a method and apparatus for detecting vertical defects in the rounded top finish of glass containers; which method and apparatus is not adversely affected by the optical inspection of the bottom of the container for defects; and which operates efliciently and rapidly.

In the drawings:

FIG. 1 is a part sectional elevational view of an apparatus embodying the invention.

FIG. 2 is a partly diagrammatic view of a portion of the apparatus.

FIG. 3 is a diagrammatic plan view showing the path of the light beam through the container.

FIG. 4 is a diagrammatic elevational view showing the path of the light beam through the container.

Referring to FIG. 1, in accordance with the invention, the container C which is to be inspected is brought into inspecting position by a star wheel 10 having pockets 11 on the periphery thereof. At the inspection station, the container C is delivered to a pad 12 that is rotated. A plurality of rollers 13 mounted on radially extending shafts 14 on a head 15 engage the top finish of the container and hold the container C in steady position against wobbling while it is rotated by the pad. The head 15 is mounted on a spring leaded arm 16.

The pad 12 is adapted to be elevated to lift the container against the rollers 13 and position a mirror 17 within the open mouth of the container. The mirror 17 forms a part of an inspection assembly 18 which includes an incandescent light bulb 19 and lenses 20 that collect and focus a beam of radiation to which the container is transparent from the light bulb 19 against the finish of the container.

As shown diagrammatically in FIGS. 3 and 4, the beam is directed against the finish of the container at an acute angle B preferably 45 degrees to a radial plane. The beam is focused in a generally vertical spot that is directed as shown in FIG. 4 at an acute angle A to a horizontal plane such that a portion of the beam intersects the top finish and the remainder of the beam passes over the top of the finish. The angle A is selected such that the light is refracted by the rounded top finish and normally passes through the top finish in a substantially horizontal plane. This angle may vary with the configuration of the top finish but it has been found than an angle of approximately 32 degrees produces satisfactory results with many of the presently available top finishes.

When a defect is present, the light beam which is directed through the top finish is reflected and refracted out of the top finish as shown in FIG. 3. A prism 21 reflects the redirected portion of the light beam upwardly and lenses 22 focus the redirected portion of the light beam against a light sensitive cell 23 such as a solar cell. A mask 24 limits the vision of the light sensitive cell 23 to the area of the top finish which is being inspected. If the light sensitive cell 23 is energized, a reject mechanism is operated to reject the container at a subsequent station.

As further shown in FIG. 1, while the top finish of the container is being inspected, the bottom is also being inspected by directing a plurality of light beams from sources 25, 26 at acute angles to radial planes and to the horizontal. If a defect is present in the bottom, it is redirected by the defect against a plurailty of light sensitive cells 27 mounted within a block 28. If a signal is produced by energization of the cells 27, the reject mechanism is actuated to reject the container at a subsequent station.

I claim:

1. The method of inspecting glass containers having rounded top finishes for vertical checks and bottom defects which comprises collecting and focusing a beam of radiant energy to which the container is transparent and directing said beam across the rounded top finish of the container in a direction generally upwardly and at an acute angle to a radial plane and at an acute angle to a horizontal plane such that a portion of the light beam intersects the top finish and the remainder of the light beam passes by the top finish,

the angle which said beam forms with a horizontal plane being such that the light is refracted by the rounded top finish and passes through the top finish in a substantially horizontal plane,

causing a vertical check in the rounded top finish to reflect a portion of the light and cause it to be refracted out of the top finish,

and rejecting a container when a portion of the beam is reflected by a vertical check,

substantially simultaneously directing a plurality of light beams upwardly against the base of the container at an acute angle to radial planes and at an acute angle to a horizontal plane,

causing a defect in the bottom of the container to redirect a portion of the light beams out of the normal path,

and rejecting the container when a portion of said plurality of light beams is redirected by a defect in the base of the container.

2. The method of inspecting glass containers having rounded top finishes for vertical checks which comprises collecting and focusing a beam of radiant energy to which the container is transparent and directing said beam across the rounded top finish of the container in a direction generally upwardly and at an acute angle to a radial plane and at an acute angle to a horizontal plane such that a portion of the light beam intersects the top finish and the remainder of the light beam passes by the top finish,

the angle which said beam forms with a horizontal plane being such that the light is refracted by the rounded top finish and passes through the top finish in a substantially horizontal plane,

causing a vertical check in the rounded top finish to reflect a portion of the light and cause it to be refracted out of the top finish,

and rejecting a container when a portion of the beam is reflected by a vertical check.

3. The method of inspecting glass containers having rounded top finishes for vertical checks which comprises collecting and focusing a beam of radiant energy to which the container is transparent and directing said beam across the rounded top finish of the container in a direction generally upwardly and at an acute angle to a radial plane and at an acute angle to a horizontal plane at right angles to a radial plane such that a portion of the light beam'intersects the top finish and the remainder of the light beam passes by the top finish.

the angle which said beam forms with a horizontal plane being about 32 degrees such that the light is refracted by the rounded top finish and passes through the top finish in a substantially horizontal plane.

causing a vertical check in the rounded top finish to reflect a portion of the light and cause it to be refracted out of the top finish,

and rejecting a container when .a portion of the beam is reflected by a vertical check.

4. An apparatus for inspecting glass containers having rounded top finishes for vertical checks and bottom defects which comprises means for collecting and focusing a beam of radiant energy to which the container is transparent and directing said beam across the rounded top finish of the container in a direction generally upwardly and at an acute angle to a radial plane and at an acute angle to a horizontal plane such that a portion of the light beam intersects the top finish and the remainder of the light beam passes by the top finish,

the angle which said beam forms with a horizontal plane being such that the light is refracted by the rounded top finish and passes through the top finish in a substantially horizontal plane,

light sensitive means having its line of vision positioned such that when a portion of light is reflected and refracted by a vertical check in the top finish, it is directed to said light sensitive means,

means for directing a plurality of light beams upwardly against the base of the container at an acute angle to radial planes and at an acute angle to a horizontal plane,

light sensitive means having a line of vision positioned such that when a portion of said plurality of light beams is redirected out of the normal path, said light sensitive means is energized,

and means for rejecting the container when either of said light sensitive means is energized.

5. The combination set forth in claim 4 including means for collecting and redirecting said light beam toward said first-mentioned light sensitive means.

6. The combination set forth in claim 5 including a mask interposed between said first light sensitive means and said container.

7. An apparatus for inspecting glass containers having rounded top finishes for vertical checks and bottom defects whichlcomprises means for collecting and focusing a beam of radiant energy to which the container is transparent and directing said beam across the rounded top finish of the container in a direction generally upwardly and at an acute angle to a radial plane and at an acute angle to a horizontal plane such that a portion of the light beam intersects the top finish and the remainder of the light beam passes by the top finish,

the angle which said beam forms with a horizontal plane being such that the light is refracted by the rounded top finish and passes through the top finish in a substantially horizontal plane,

light sensitive means having its line of vision positioned such that when a portion of light is reflected and refracted by a vertical check in the top finish, it is di- 'rected to said light sensitive means,

and means for rejecting said container in response to the energization of said light sensitive means.

8. The combination set 'forth in claim 7 including means for collecting and redirecting said light beam toward said light sensitive means.

9. The combination set forth in claim 8 including a mask interposed between said light sensitive means and said container.

19. An apparatus for inspecting glass containers having rounded top finishes 'for vertical checks and bottom defects which comprises means for collecting and focusing a beam of radiant energy to which the container is transparent and directing said beam across the rounded top finish of the container in a direction generally upwardly and at an acute angle to a radial plane and at an acute angle to a horizontal plane such that a portion of the light beam intersects the top finish and the remainder of the light beam passes by the top finish,

the angle which said beam forms with a horizontal plane being approximately 32 degrees such that the light is refracted by the rounded top finish and passes through the top finish in a substantially horizontal plane,

light sensitive means having its line of vision positioned such that when a portion of light is reflected and refracted 'by a vertical check in the top finish, it is directed to said light sensitive means,

and means for rejecting said container in response to the energization of said light sensitive means.

References Cited UNITED STATES PATENTS 10/1963 Mathias et al. Q 2'09111.7

8/1966 Mathias 209-4117 2/1967 Conrad 209111.7 X

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3107011 *Dec 23, 1960Oct 15, 1963Owens Illinois Glass CoInspecting rims of containers
US3267796 *Dec 24, 1964Aug 23, 1966Owens Illinois Glass CoInspecting rims of open mouth containers
US3302786 *Sep 29, 1964Feb 7, 1967Owens Illinois IncInspecting glass containers with lasers
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3478218 *Dec 15, 1965Nov 11, 1969IttApparatus and method for detecting flaws in articles of glass and the like
US3486875 *Aug 16, 1966Dec 30, 1969Pymm EdwardOutline image controlled glass blowing machine
US3574470 *Jul 2, 1969Apr 13, 1971NasaMethod and device for detecting voids in low-density material
US3629595 *Mar 11, 1970Dec 21, 1971Barry Wehmiller CoTransparent container inspection apparatus
US3918570 *Feb 15, 1974Nov 11, 1975Owens Illinois IncContainer stabilizing apparatus
US4075086 *Aug 5, 1976Feb 21, 1978Owens-Illinois, Inc.Glass container handling
US4213042 *Oct 2, 1978Jul 15, 1980Barry-Wehmiller CompanyContainer chipped crown ring detector
US4323158 *Jul 3, 1980Apr 6, 1982Wheaton IndustriesBottle neck finish inspection apparatus
US4391373 *Nov 10, 1980Jul 5, 1983Barry-Wehmiller CompanyMethod of and apparatus for compensating signal drift during container inspection
US5405015 *Aug 11, 1993Apr 11, 1995Videojet Systems International, Inc.For analyzing the physical condition of a moving article
US5499718 *Jan 20, 1995Mar 19, 1996Videojet Systems International Inc.System and method for seeking and presenting an area for reading with a vision system
USB442859 *Feb 15, 1974Jan 28, 1975 Title not available
DE3742501A1 *Dec 15, 1987Jul 14, 1988Owens Illinois Glass ContainerAutomatische steuerung fuer glasbehaelterherstellung
Classifications
U.S. Classification209/526, 65/158, 209/538, 209/587, 209/585, 250/223.00B
International ClassificationB07C5/12, G01N21/90
Cooperative ClassificationG01N21/9054, B07C5/126, G01N21/9072
European ClassificationG01N21/90F, G01N21/90N, B07C5/12A2