Easy-open end and laminated steel sheet

Details Easy-open end and laminated steel sheet Easy-open end and laminated steel sheet

2004-05-21

2010-02-23

O'Hern, Brent T (Department: 1794)

Stock material or miscellaneous articles

Sheet, web, or layer weakened to permit separation through...

C220S200000, C220S260000, C220S268000, C220S269000, C428S216000, C428S221000, C428S332000, C428S458000, C428S480000

Reexamination Certificate

active

07666487

ABSTRACT:
An easy-open end which comprises a steel sheet and formed on at least one side thereof an about 10-30 mum-thick coating film of a polyester resin having a 50% crystallization time of about 5 minutes or shorter and a coefficient of planar orientation of about 0.04 or lower and which has a groove for cutting which has a cross section having a radius of curvature of about 0.1 to 1 mm; and a laminated steel sheet for use in the easy-open end. This easy-open end can combine suitability for opening and no need of repair even when the residual score thickness is small.

REFERENCES:
patent: 5900325 (1999-05-01), Okamura et al.
patent: 1 046 589 (2000-10-01), None
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patent: 2000158588 (2000-06-01), None
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patent: 2000318734 (2000-11-01), None
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Translation of JP 2000158588 A (Iwasa et al.), see above.
Translation of JP 2000318734 A (Yamanaka et al.), see above.
European Patent Office issued a Supplementary European Search Report dated Apr. 23, 2009, Application No. 04 73 4402.

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