B - Operations – Transporting – 43 – K
Patent
B - Operations, Transporting
43
K
B43K 19/00 (2006.01) B29C 47/06 (2006.01) B43K 19/16 (2006.01)
Patent
CA 2062381
According to the invention, the writing or coloring pencil is obtained by tri-extrusion of three thermoplastic materials forming the lead material, the expanded wood material and an intermediate protective layer, containing no expanding agent, which is compatible with the lead material and the wood material and has a melting point which is equal to or higher than the melting points of the lead material and the wood material. The three co-extruded materials all contain in particular the same basic component, such as for example a polystyrene-methacrylate copolymer. The protective layer can be of a different color from the other two layers. The writing or coloring pencil with protective casing between the lead and the expanded wood, all three being in thermoplastic material, is, in particular a pencil with soft or extra-soft lead.
Bachelet Jacques
Chavatte Philippe
Chochoy Guy
Duez Jose
Fouble Claude
Conte S. A.
Sim & Mcburney
LandOfFree
Process for manufacturing a writing or coloring pencil by... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for manufacturing a writing or coloring pencil by..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for manufacturing a writing or coloring pencil by... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1644306