Abstract: A method of increasing the tack of a pressure sensitive adhesive by exposing a polymeric pressure sensitive adhesive to an activating treatment, activatable articles containing such an adhesive and adhesive compositions resulting from such an activating treatment. The activatable, polymeric, pressure sensitive adhesive is preferably a water based adhesive prepared by free radical polymerization of acrylic acid, methacrylic acid, acrylate, or methacrylate monomers having from 1 to about 12 carbon atoms. The activating treatment is preferably corona charging or corona charging in combination with uv light.

Abstract: A microencapsulated adhesive and a method for producing that microencapsulated adhesive is disclosed. The adhesive is produced from an alkyl acrylate or methacrylate monomer having about 4 to about 12 carbon atoms, or a mixture thereof. The monomer is encapsulated by interfacial polymerization, gelatin/gum arabic coacervation or melamine/formaldehyde encapsulation. The microcapsules may be polyamide or polyurea. The monomer is polymerized in the microcapsules by heating to form an adhesive that is non-tacky, but becomes tacky upon application of external forces, such as shearing. The microencapsulated adhesive composition may be used, among other applications, as an adhesive for stamps or envelopes.

Abstract: A method of increasing the tack of a pressure sensitive adhesive by exposing a polymeric pressure sensitive adhesive to an activating treatment, activatable articles containing such an adhesive and adhesive compositions resulting from such an activating treatment. The activatable, polymeric, pressure sensitive adhesive is preferably a water based adhesive prepared by free radical polymerization of acrylic acid, methacrylic acid, acrylate, or methacrylate monomers having from 1 to about 12 carbon atoms. The activating treatment is preferably corona charging or corona charging in combination with uv light.

Abstract: A non-silicone release material for use with pressure sensitive adhesives, which contains a copolymer of:(1) an acrylate ester of the formula I: ##STR1## wherein x ranges from about 30 to about 50; and (2) at least one comonomer selected from a vinyl monomer, an acrylate monomer or a methacrylate monomer. Preferably, the acrylate ester is about 1 to about 25% by weight of the copolymer composition. The release material can be used as a backsize for pressure sensitive adhesives, particularly repositionable labels.

Abstract: A pressure sensitive adhesive is disclosed that is tack-free to the touch, but forms a permanent bond under moderate pressure. The pressure sensitive adhesive contains a tacky adhesive latex, a non-tacky latex or polymer, and an inert filler. The tacky adhesive latex provides the sealing properties, the non-tacky latex or polymer provides blocking properties and the filler absorbs oil that may adversely affect the sealing properties. The adhesive is tack-free to the touch yet becomes activated to form a permanent bond under moderate sealing pressure.

Abstract: A document system having improved image security for preventing or reducing the likelihood of successful alteration of information printed on a document includes a detectable substance is released from ruptured microcapsules onto the document in image areas. The substance that penetrates through the document to form a confirming image on the reverse surface. Another detectable substance of lesser penetrating ability simultaneously may be released onto the document in the image areas. Spreading of the first substance outside the boundaries of the image area created by the second substance may produce a halo effect around the image area. Documents as treated by the methods are disclosed, as well as articles comprising a document to be treated in contact with a sheet coated with the detectable substance. The first substance is microencapsulated, the second substance may or may not be microencapsulated.

Abstract: A parcel waybill is provided, having a clear plastic cover sheet and a document package. The inside face of the cover sheet is coated with an adhesive and the uppermost sheet of the document package and at least one insert sheet of the document package are comprised of carbonless copy paper adapted to provide a visible image thereon. The cover sheet is adapted to form, in conjunction with a surface of a parcel, an envelope pocket removably holding the document package.

Abstract: A continuous business form assembly comprises a continuous web incorporating a plurality of business forms, the business forms each having a window flap portion and a non-window, remainder portion, the form having an exterior surface and an opposite, interior surface. The window flap portion has a first face defined on the web exterior surface and a second face defined on the web interior surface, the window first face and second face thereby being defined on the opposite exterior and interior surfaces of the form. The window flap portion is partially cut from the form to thereby form a window at least partially defined by one edge providing a fold line about which the window flap portion is foldable to a printing position in which the window flap first face is exposed with the interior surface of the form, for simultaneous, printing of the window flap first face and the interior surface of the form.

Abstract: Method and apparatus are provided for forming an envelope wherein front and rear panels of an envelope are incorporated in continuous or discrete webs or sheets. Heat activatable adhesive is applied to three peripheral edge portions of one of the envelope panels in facing engagement with the other of the panels. The webs or sheets are fixed together and fed into a printing machine such as a table or desk top laser printer wherein the heat fusing rolls of the printer are utilized to activate the heat activatable adhesive to thereby secure the envelope panels together to form an envelope pocket. One of the envelope panels incorporates a sealing flap portion which may be provided with a rewettable adhesive pattern, while the facing portion of the opposed sheet may be provided with an antistick composition to prevent premature sticking between the sheets in the area of the sealing flap.

Abstract: A stuffed sealed envelope assembly has a free insert immobilized therein against shifting by means of adhering material provided on confronting surfaces both the front and back of the envelope and so characterized that the material will stick only to itself and not to the insert. Such material is placed in contact with the insert while remaining unattached therefrom so as to snugly hold the insert in registry within the envelope. Removal of an envelope stub facilitates opening and extraction of the insert.

Abstract: A continuous business form assembly provides for computer generated packing slips in adhesive-backed packing envelopes with accompanying packing slip records. A narrow back web with adhesive provides packing slip envelope back panels. A superimposed wide insert web has a non-marginal registry strip inward of a marginal strip, transverse die cuts, and provides product packing slips between snap out perforation lines. A superimposed, narrow front web has a superimposed registry strip, snap perforation lines, and provides packing slip envelope front panels. A narrow adhesive protective web underlies the packing slip envelope back panels, and a wide record web is superimposed on the front web. If desired, feed strips of removed units of the assembly may be left in printer tractors to feed the remainder of the assembly.