Abstract: A method is provided for making mirrors having enhanced reflective layer resistance to corrosion. The reflective layer of the mirror, typically silver, is contacted, preferably simultaneously, with a first solution containing a specific cation and a second solution containing a specific anion, or alkaline material which forms hydroxyl ions, the specific cation and specific anion or hydroxyl ion reacting to form a water insoluble precipitate on the silver surface. The mirror may then be painted to provide additional corrosion resistance to the mirror. The method eliminates the need for a copper layer on the silver surface and the method may be incorporated into existing mirror production lines as a replacement for the copper layering step. Also provided are an apparatus for making the mirrors and the mirrors made using the method and apparatus of the invention. A preferred cation containing solution contains tin (e.g., SnCl2) and a preferred anion containing solution contains hydroxyl ions (e.g., NaOH).
Abstract: A method is provided for making mirrors having enhanced reflective layer resistance to corrosion. The reflective layer of the mirror, typically silver, is contacted, preferably simultaneously, with a first solution containing a specific cation and a second solution containing a specific anion, or alkaline material which forms hydroxyl ions, the specific cation and specific anion or hydroxyl ion reacting to form a water insoluble precipitate on the silver surface. The mirror may then be painted to provide additional corrosion resistance to the mirror. The method eliminates the need for a copper layer on the silver surface and the method may be incorporated into existing mirror production lines as a replacement for the copper layering step. Also provided are an apparatus for making the mirrors and the mirrors made using the method and apparatus of the invention. A preferred cation containing solution contains tin (e.g., SnCl.sub.2) and a preferred anion containing solution contains hydroxyl ions (e.g., NaOH).
Abstract: A lead-free composition capable of being applied as a film and hardening to form a protective layer on the back of a mirror comprises a fluid organic resin and a corrosion inhibitor selected from a compound represented by the formula: ##STR1## wherein the individual radicals R.sup.1, R.sup.2, R.sup.3 and R.sup.4 can be identical or different and are each hydrogen, an aliphatic, cycloaliphatic, araliphatic or aromatic radical, and can be substituted or unsubstituted; A is hydrogen or C.sub.z --CR.sup.5 R.sup.6 CN; X, Y and Z are independently selected from 0-5; and R.sup.5 and R.sup.6 are as defined for R.sup.1, R.sup.2, R.sup.3 and R.sup.4 above. To inhibit the corrosion of metallic film layers on mirrors, a mirror having a glass substrate layer and metallic film layer thereover should be obtained, after which the fluid organic resin coating system containing the aforementioned corrosion inhibitor is applied over the metallic film layer.
Abstract: A bag closure clip including a pair of opposing T-shaped clip members held in pivotal engagement by a U-shaped metal spring. Each clip member includes a jaw, a handle, and a fulcrum. As the handles are squeezed toward each other, the jaws open to allow a bag, such as for snack food or cereal, to be inserted between the jaws. When the handles are released, the spring forces the jaws towards each other to grip the bag and hold it closed. The U-shaped spring is fitted over the fulcrum and is confined to the space between the clip members so that the outwardly facing surfaces of the clip members are substantially uninterrupted.
Type:
Grant
Filed:
November 6, 1996
Date of Patent:
September 8, 1998
Assignee:
Lilly Industries (USA), Inc.
Inventors:
John G. Dorman, Gordon Isenga, Russell O. Blanchard