Drawing and coloring element in form of blackboard-chalk-like stick for producing pictures that can be fixed through application of heat
OwnerTheodor Berghoferinventor
Life of this patent
Estimating the term…
Abstract
Drawing and coloring element in the form of blackboard-chalk-like stick for producing pictures that can be fixed on bases through the application of heat.
Claims11
In a drawing and coloring element in the form of a stick for producing pictures on a substrate, consisting of a fixing-effective amount of a binder made of at least one initially fusible synthetic resin which is thermoplastic or thermosetting and which is selected from the group consisting of an acrylic resin, epoxy resin, polyester resin, polyurethane resin and mixtures thereof, and a coloring-effective amount of at least one inorganic color-producing pigment, organic color-producing pigment or mixture thereof and optionally dyes soluble in the synthetic resin, as well as additives customary in the thermal processing of thermoplastic or thermosetting synthetic resins, the improvement wherein
- the drawing and coloring element is a friable and chalk-like stick consisting of a compacted mixture of powdered components cold consolidated in a press through application of pressure below the fusing or hardening temperature of said resin, said color-producing pigment being present in such mixture in an amount of 5-50% by weight in relation to the total amount of the resin-type binder and said pigment.
A friable, chalk-like drawing and coloring stick for producing pictures on a substrate which pictures can be fixed and hardened on the substrate through the application of heat, comprising
- a binder of at least one fusible thermosettable synthetic resin in powder form selected from the group consisting of an acrylic resin, epoxy resin, polyester resin, polyurethane resin and mixtures thereof, and
- at least one color-producing pigment in powder form, said pigment being present in a coloring-effective amount comprising 5-50% by weight of the total amount of said synthetic resin binder and said pigment;
- said powdered resin binder and said powdered color producing pigment being consolidated by cold pressing in a press through the application of pressure below the fusing and hardening temperature of said resin.
A method of making a chalk type stick for drawing and coloring to produce pictures of a permanent nature by the application of heat, comprising mixing at least one fusible thermosettable synthetic resin in powder form with a coloring pigment in powder form, the relative quantities thereof being 5-50% by weight pigment and 95-50% by weight thermosettable resin;
- forming said powder mixture into a stick by cold pressing in a press under pressure on the order of about 90 kp/cm.sup.2 and at a temperature below the fusing and hardening temperature of said thermosettable resin.
Dependencies are inferred from the claim text.