Abstract Sealed piezoelectric crystal devices with desired frequency response characteristics are manufactured by treating and sealing each crystal in a vacuum environment within a common apparatus housing. Vapor deposition treatment is utilized, with treating material replenishing mechanisms being positioned within the vacuum environment in order to avoid disturbing the vacuum environment during replenishing operations. Sealing is performed by cold weld sealing a pair of covers about each treated crystal device. The arrangement is designed to minimize alterations in the crystal frequency response characteristics subsequent to the vapor deposition treatment. A die stripping device for ejecting each sealed article from two article-forming, cold weld sealing dies is incorporated entirely into the dies. An ejector on a bottom die is activated during sealing by an actuator of a top die. Ejection of the article from the bottom die then occurs upon die separation. The apparatus also includes a pair of turntables which overlap peripherally at a sealing station within the housing. A loading and unloading station, for introducing top covers and crystals into upper sealing dies and removing sealed crystal filter assemblies from the apparatus, and a vapor deposition crystal treating station are arrayed about one turntable. Manual and automatic loading stations for loading bottom covers into lower sealing dies are arrayed about the other turntable. Also included in the apparatus are various loading and unloading mechanisms and associated airlock arrangements at the different stations.
In a cold weld bonding device, as set forth in claim 1, said ejecting means further comprising: means, carried by said first die means and rendered effective after a limited movement of the locking member in said outward direction, for unlocking the follower means from the locked condition with respect to the locking member; and means responsive to the unlocking of the follower means from the locking member for moving the locking member and the article engaging and driving means in a direction opposite to said outward direction.
Claim 2
Dependent Claim
91 words
In a cold weld bonding device, as set forth in claim 2: direction opposite to said outward direction. said locking member comprising a beveled finger biased in a locking direction; and said follower means having a beveled surface positioned to engage the beveled finger upon actuation by the actuating means and to cam the beveled finger opposite to the locking direction so as to latch the beveled surface in said locked condition with the beveled surface displaced beyond the beveled finger and the beveled finger biased back in the locking direction.
Claim 3
Dependent Claim
65 words
In a cold weld bonding device, as set forth in claim 3, said unlocking means comprising: a fixed, beveled surface on said first die means positioned to engage the beveled finger upon a limited movement thereof in said outward direction and to cam the beveled finger opposite to the locking direction until the beveled surface of the follower means is free of the beveled finger.
Claim 4
Dependent Claim
107 words
In an apparatus for forming an article between a pair of die means: means for reciprocating at least one of the dies to thereby move the dies together to form the article and move the dies apart to release the article; means positioned in one of the dies for driving the article from the dies; means for moving said driving means to drive the article from said dies; means for coupling said moving means to said driving means upon moving said dies together; and means for uncoupling said moving means from said driving means upon moving said dies a predetermined distance apart to deactivate said driving means.
Claim 5
Dependent Claim
37 words
The apparatus of claim 5 wherein the moving means includes at least one spring which is put into a positive elastic potential energy state upon moving the dies together and releases energy upon moving the dies apart.