Adhesive-applying apparatus

An apparatus for the application of adhesive to building blocks comprising:

• a substantially horizontal planar supporting surface,
• an upright frame member extending perpendicularly of the plane of said supporting surface and to one side thereof,
• a transverse frame member extending substantially transverse to but vertically spaced from said supporting surface substantially perpendicularly of said upright frame member,
• first adhesive applying means mounted to said upright frame member and vertically movable relative thereto between said supporting surface and said transverse frame member for applying adhesive to selected portions of one side face of a building block on said supporting surface,
• said first adhesive applying means comprising a first pair of nozzles spaced apart slightly less than the width of the side face of the building block,
• second adhesive applying means mounted to said transverse frame member and movable longitudinally thereof towards and away from said upright frame member for applying adhesive to selected portions of the top face of a building block on said supporting surface,
• said second adhesive applying means comprising a second pair of nozzles spaced apart slightly less than the width of the top face of the building block,
• first pneumatically controlled means for reciprocation of said first pair of nozzles through the height of said block,
• second pneumatically controlled means for reciprocation of said second pair of nozzles through the length of said top face,
• holding means for holding said building block on said supporting surface for application of adhesive thereto, said holding means comprising a stop member disposed adjacent said upright frame member and a movable pusher plate disposed on the opposite transverse side of said supporting surface from said stop member and cooperating with said stop member to apply lateral pressure to a block on said supporting surface to grip said block therebetween, and
• removable stop means located at the downstream end of said supporting surface to prevent discharge of a building block from said apparatus until adhesive has been applied thereto,
• said stop means including a vertically disposed plate and movable between a first position wherein it extends from the underside of said supporting surface to a position projecting above the plane of said supporting surface and thereby preventing movement of a block situated on the supporting surface out of the apparatus and a second position wherein said plate does not extend above the plane of said supporting surface and thereby a block situated on said supporting surface may be discharged from the apparatus.