Abstract: A wiper (22, 960) has a length (L) which is divided into a distal segment (D), a middle segment (M) and a proximal segment (P). Wiper (22) has first and second wiper blades (26, 28), defining therebetween a channel (30); wiper (960) has a longitudinal enclosed tubular channel (964) formed in central portion (962). One or both of the blades (26, 28), or at least one side of central portion (962), have one-way water-passage formations thereon along the middle segment (M) of the length (L) thereof. Such formations, e.g., notches (34, 36, 986a, 986b), are dimensioned and configured to permit passage of water therethrough to the channel (30, 964) when the wiper (22, 960) is moving in a first direction, and to prevent passage of water therethrough when the wiper (22, 960) is moving in a second direction opposite to the first direction.

Abstract: A wiper (22) has a length (L) which is divided into a distal segment (D), a middle segment (M) and a proximal segment (P). Wiper (22) has first and second wiper blades (26, 28), each having wiping faces (26c, 28c) in contact with a surface S and defining therebetween a channel (30). One or both of the blades (26, 28) have one-way water-passage formations thereon along the middle segment (M) of the length (L) thereof. Such formations, e.g., notches (34,36), are dimensioned and configured to permit passage of water through, e.g., the second blade (28), to the channel (30) when the second blade (28) is moving in a first direction, and to prevent passage of water through notches (34) when the second blade is moving in a second direction opposite to the first direction. Conversely, the first blade (26) formations, e.g.

Abstract: A wiper allows controlled passage of water through at least one blade of the wiper. In one embodiment, the wiper comprises first and second substantially parallel wiper blades (26, 28), each having wiping faces (26c, 28c) in contact with a surface S and defining therebetween a channel (30). The blades (26, 28) have formations thereon, such as notches (34,36) dimensioned and configured to permit passage of water through first blade (26) to the channel (30) when the first blade (26) is moving in a first direction and to prevent passage of water through notches (34) when the first blade is moving in a second direction opposite to the first direction. The second blade (28) formations, e.g., notches (34) permit water to pass through the formations when the second blade (28) is moving in the second direction and to prevent passage of water therethrough when the second blade is moving in the first direction. Water trapped within channel (30) will then be diverted out the ends of the channel.

Abstract: A button enhancement coating system wherein mechanically actuated buttons and vacuum actuated buttons of closures may be provided with a coating system which changes color after the closure has been applied to a container and then removed therefrom with the change in color indicating tampering. The coating system includes a first coating layer applied directly to the upper surface of the button and a second coating layer of a different color applied in overlying and bonded relation to the first coating layer. The second coating layer is preferably transparent and the two colors are selected so that they produce a third color while the coating layers are bonded together. When the two coating layers become separated during the removal of the closure from a container, the button assumes the color of the second coating layer. The first coating layer may have an embossed upper surface including ribs and grooves with the second coating layer flowed thereinto.