ISO 9885:1991 pdf download – Wide-mouth glass containers一Deviation from flatness of top sealing surface一Test methods
ISO 9885:1991 pdf download – Wide-mouth glass containers一Deviation from flatness of top sealing surface一Test methods.
4.1 Quick check to determine whether the top sealing surlice meets predetermined flatness requfroments.
4.2 Maasuremnnt of ihe dislarice between the top sealing surface and a flat plate pressed onto this surface.
5.1 Kortzontsl flat besepêat.
Sampling shall form the iubect of agreement between the parties concerned
Invert the contaIner on the horizontal fiat baseplate (Si). If th. container rocks, allow II to stabIlize before continuing with the determination.
7.2 QuIck check to determine whether the top sealing surface meets predetermined flatness requirements
7.2.1 Select a feeler gauge (5.2) or the same thickness as the out-of-flatness deviation permitted.
7.2.2 Try to insert the feeler gauge in the gap, If present, between the baseplate and the top sealing surface throughout the circumference of the finish. During this operation the gauge shall lie flat on the baseplate and shall be moved smoothly on it. The feeler gauge is considorod to be Inserted when its head reaches over the Inside edge of the finish, provided that during this operation the container under test does not rock or exhibit any other motion.
7.2.3 the gauge cannot be Inserted from any direction, the container is considered to meet the flatness requirement.
7.2.4 the gauge can be inserted, repeat the procedure described In 7.2.2 using the next thicker gauge. If this second gauge cannot be inserted, the container Is considered to meet the flatness requirement. If this second gauge can be Inserted, the container Is considered as not meeting the flatness requirement.
7.3 DetermInation of deviation from flatness of top sealing surface
7.3.1 According to the case, select a feeler gauge of the same thickness as the out-of-flatness deviation permitted, or select the smallest gauge or the second smallest gauge (i.e. 0,1 mm).
7.3.2 Try to Insert the feeler gauge selected, using the same procedure as described in 7.2.2.
7.3.3 ContInue the determination using smaller or larger gauges as necessary. The determination is terminated when two gauges are identified which differ in thickness by not more than one step (i.e. 0,05 mm), the smaller one of which can be Inserted and the larger one of which cannot.
8 ExpressIon of results
8.1 QuIck check (7.2)
if results by attributes are required, take as the result the number or containers which meet the flatness requirement.
8.2 DetermInation (7.3)
For each container tested, take as the result the thickness, In millimetres, of the smaller of the two gauges Identified In 7.3.3.
9 Test report
The test report shall specify the following Information:
a) reference to this International Standard;
b) reference to the test method(s) used (I.e. 7.2 and/or 7.3);
c) the size of the sample and the type of container tested;
d) manufacturing details;
e) the type of apparatus used;
f) the results obtained;
g) the tester’s name and signature, and date of test.