The present invention is directed to new and improved apparatus for measuring overlay error between a wafer pattern and a mask pattern projected onto the wafer pattern by a lithographic exposure instrument, which includes a grating mask; a grating wafer having reflective lines alternating with non-reflective spaces patterned like the mask pattern; the lithographic instrument having projection optics mounted to project an image of the mask on the wafer, and a mechanism for moving the grating mask...

A press for applying an overlay to the front and sides of an elongate workpiece. Elongate edge margins of a forming sheet are manipulated through actuation of arrays of sheet-manipulating and positioning piston-cylinders to cause the forming sheet to wrap around the workpiece and during such wrapping to press an overlay against the workpiece. Tray assemblies support a workpiece while the overlay is applied, and these are mounted from movement from within to outside the press, to facilitate reloa...

A press for applying an overlay to the exterior surfaces of an element where such surfaces have a convexity extending transversely of the longitudinal axis of the element. A tensed forming sheet is included in the press which is caused to wrap around the element to which the overlay is applied.

A flexible touch switch in which indicia and conductive contact portions are both formed on the undersurface of a flexible overlay that is transparent with respect to the indicia.

The present invention relates to a novel sheet adapted to be adhered to and form the outer layer of a wood article, said sheet being made from a furnish comprising, for each 100 parts by weight, from about 10 to 25 parts synthetic pulp, 10 to 25 parts by weight mineral fiber, 0.1 to 2 parts size, 0.1 to 2 parts wet strength agent, and 79.8 to 46 parts wood fiber and to laminates comprising a wood core and said sheet adhered to at least one surface of said core.

An artificial nail overlay on which a predetermined picture or pattern has been pre-printed. The overlay is flattened to be dyed or printed so that it provides advantage of removing the separate designing work on silk fabrics during the attaching process of the artificial nail to a natural nail.

A mapping arrangement for memory overlay wherein the address coordinates are referenced to a main serial memory. This main memory is partitioned into pages of equal size. An accelerator memory is concurrently loaded with a few pages representing a small portion of the main memory contents and is periodically overlayed with new memory contents on a page-at-a-time basis as the using system demands. During this overlay the fields of the accelerator memory are inscribed at corresponding main memory ...

An imperforate display membrane is backlit by placing an apertured support between a light source and the display membrane so that light travels through the support and forms a spot on the membrane at a desired position having display indicia in registration therewith. One or more overlay members are provided and with said members having revised indicia thereon which either up-dates, corrects or otherwise revises the indicia on the original membrane. The membrane support and each overlay member ...

Disclosed is a label or patch overlay dispensing apparatus having a storage reel for carrying a supply tape of adhesive overlays, a feed throat for receiving a document to which an overlay is to be attached and a contact for sensing a document in the feed throat and for causing the advancement of the document to a label attaching position. The device is responsive to the receipt of the document in the overlay attaching position for releasing an overlay or patch for attachment to the document and...

A word processing system is provided with separate data structures in system memory (4). One of these, the internal image, contains the calculated graphics image and another the operator's alphanumeric character input. When displaying, the two images are merged together with the annotation overlay effectively overlaying the graphics overlay. In this way, if the operator erases something on the annotation overlay, the contents of the graphics overlay reappear. During the display of the calculated...