Abstract: A disposable draw sheet for use on bed mattresses in which a thin sheet of liquid impervious material supports a liquid absorbent material layer. The liquid impervious sheet is wide enough to be tucked under each side of the mattress. Pockets formed by doubling the longitudinal margins of the sheet back upon themselves and tacking them at spaced discrete areas provide easy application and removal of the draw sheets.

Abstract: An envelope for two-way mailing having opposed front and rear panels secured together around three sides to provide an open edged pocket, a first flap to seal the pocket is foldably carried on the edge of the pocket by one panel. A resealing flap is carried on the edge of the pocket by the other panel. The resealing flap is inwardly folded upon its panel and disposed within the pocket during the first mailing. At least one spot of adhesive is employed to couple the resealing flap to an insert carried within the pocket. When the insert is pulled from the pocket, it automatically lifts the return flap from the pocket placing the envelope in its return mailing condition.

Abstract: An envelope for two-way mailing having opposed front and rear panels secured together around three sides to provide an open edged pocket, a first flap to seal the pocket is foldably carried on the edge of the pocket by one panel. A sealing flap is carried on the edge of the pocket by the other panel. The resealing flap is inwardly folded upon its panel and disposed within the pocket during the first mailing. A spot of adhesive at each end of the resealing flap between the said flap and its panel, adjacent the open edge portion of said panel, prevents the resealing flap from being severed from the envelope by the improper insertion of a letter opening device.

Abstract: A photographic printing apparatus in which spaced photosensitive strips are secured to an image plane on top of a housing. An imaging font having two sets of identical symbols in spaced relationship is movably carried upon the housing overlying the photosensitive strips. Light is directed through selected portions of the imaging font upon one of the strips to form a latent image, which is subsequently developed and an instantly visible image on the other strip. The instantly visible image is used by the operator to space subsequent letters or symbols as the printing proceeds.