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 Marker pencil

Details
Inventors: Horvat, Ivan; Schweizer, Manfred; Stoecklein, Thomas;
Assignee: Schwan-Stabilo Schwanhaeusser GmbH & Co. (Nuremburg, DE)
Primary Examiner: Green; Anthony
Assistant Examiner:
Attorney, Agent or Firm: Bachman & LaPointe

A marker pencil comprises a gel-like water-bearing pencil material enclosed in a casing and incorporating a dye carrier. The structure-forming constituents of the pencil material include water-soluble metal soaps and saccharides and/or polyols derived therefrom by reduction. As a further alternative constituent the pencil material may include a fatty substance.

DETAILED DESCRIPTION We claim: 1.
A marker pencil comprising a casing and a marking pencil material enclosed in the casing, wherein the pencil material comprises: a dye carrier; structure forming constituents comprising at least one water soluble metal soap in an amount of between about 5% to about 40% by weight of the pencil material, and at least one member selected from the group consisting of monosaccharides, oligosaccharides and polyols derived therefrom by reduction, in an amount of between about 5% to about 50% by weight of the pencil material; and water in an amount of between about 15% to about 65% by weight of the pencil material.
2.
A marker pencil as set forth in claim 1 wherein the pencil material has thixotropic characteristics.
3.
A marker pencil as set forth in claim 1 wherein the pencil material contains at least one fatty substance in an amount between of about 5% to about 25% by weight of the pencil material, said fatty substance serving as a further structure-forming constituent and to improve adhesion and reduce drying time of a pencil mark on a surface to which said pencil material is applied.
4.
A marker pencil as set forth in claim 3, wherein said fatty substance is selected from the group consisting of natural wax, synthetic wax, solid triglycerides of C.
sub.
18 -C.
sub.
36 fatty acids, liquid triglycerides of C.
sub.
6 -C.
sub.
10 fatty acids, stearines, paraffin oil and vegetable oil.
5.
A marker pencil as set forth in claim 3 wherein said proportion of fatty substance is between about 8 and 15% by weight.
6.
A marker pencil as set forth in claim 1 wherein a proportion of metal soap is between about 8 and 20% by weight.
7.
A marker pencil as set forth in claim 1 wherein a proportion of saccharide in the pencil material is between about 5 and 50% by weight.
8.
A marker pencil as set forth in claim 7 wherein said proportion of saccharide is between about 25 and 40% by weight.
9.
A marker pencil as set forth in claim 1 wherein a proportion of polyol in the pencil material is between about 5 and 50% by weight



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