CH109501A - Pushpin and method for its manufacture. - Google Patents
Pushpin and method for its manufacture.Info
- Publication number
- CH109501A CH109501A CH109501DA CH109501A CH 109501 A CH109501 A CH 109501A CH 109501D A CH109501D A CH 109501DA CH 109501 A CH109501 A CH 109501A
- Authority
- CH
- Switzerland
- Prior art keywords
- manufacture
- plate
- pushpin
- metal
- point
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43M—BUREAU ACCESSORIES NOT OTHERWISE PROVIDED FOR
- B43M15/00—Drawing-pins, Thumb-tacks
Landscapes
- Punching Or Piercing (AREA)
- Forging (AREA)
Description
Punaise et procédé pour sa fabrication. L'objet de la. présente invention est un procédé pour la, fabrication de punaises, par emboutissage de plaques faisant saillir la pointe d'un point quelconque de la plaque, la punaise réalisée selon @ce procédé étant ,ainsi obtenue de façon que le métal qui la co:nsti- tue. reste en une seule pièce et sans solution de :continuité.
Le dessin annexé montre, à titre d'exem- ple, une forme d'exécution de l'objet de l'in vention.
La fib. 1 est une coupe axiale de la, pla- que destinée à être emboutie; La, fig. 2 est une :coupe axiale de la pu nel.ise finie: La. fig.. 3 est une vue en plan depuis le haut :correspondant à. la. fib. 2.
La, plaque 1, circulaire et de diamètre D', (St soumise à. la poussée -d'un -doigt d'embou- i issa.be, non représenté, qui pousse partielle ment le métal de 1 dans une forme d'emb:ou- t:
is.@a.be. Cette poussée fait saillir du métal de la, plaque la. pointe 2 pourvue au milieu d'un évidement 3 dû à l'introduction du doigt d'emboutissage. Le métal qui -constitue la pointe 2) étant emprunté à la. plaque originale 1, le diamètre extérieur de celle-ci diminue de <I>D' à D".</I> L'emboutissage laisse subsister un congé 4 reliant la face 5 de la plaque avec l'extérieur de la pointe 2 et un congé 6 re- li.a.nt la face 7 de la plaque avec l'évidement intérieur 3 de la pointe 2.
Pushpin and method for its manufacture. The object of the. present invention is a process for the manufacture of tacks by stamping plates projecting the tip from any point of the plate, the pin produced according to this process being, thus obtained so that the metal which co: nsti - kill. remains in one piece and without solution of: continuity.
The accompanying drawing shows, by way of example, an embodiment of the object of the invention.
The fib. 1 is an axial section of the plate intended to be stamped; The, fig. 2 is an: axial section of the finished pu nel.ise: Fig. 3 is a top plan view: corresponding to. the. fib. 2.
The, plate 1, circular and of diameter D ', (St subjected to. The thrust -of a -digt d'embou- iissa.be, not shown, which partially pushes the metal of 1 into a form of emb: or- t:
is. @ a.be. This thrust protrudes from the metal of the plate. tip 2 provided in the middle with a recess 3 due to the introduction of the stamping finger. The metal which -constitutes the point 2) being borrowed from the. original plate 1, the outside diameter of the latter decreases from <I> D 'to D ". </I> The stamping leaves a fillet 4 connecting the face 5 of the plate with the outside of the tip 2 and a fillet 6 connects the face 7 of the plate with the interior recess 3 of the tip 2.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH109501T | 1924-05-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH109501A true CH109501A (en) | 1925-06-01 |
Family
ID=4368511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH109501D CH109501A (en) | 1924-05-03 | 1924-05-03 | Pushpin and method for its manufacture. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH109501A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4699212A (en) * | 1982-06-18 | 1987-10-13 | Alfa-Laval Thermal Ab | Plate heat exchanger |
-
1924
- 1924-05-03 CH CH109501D patent/CH109501A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4699212A (en) * | 1982-06-18 | 1987-10-13 | Alfa-Laval Thermal Ab | Plate heat exchanger |
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