Self-inking stamping device

• US 4,432,281 A
• Filed: 03/10/1982
• Issued: 02/21/1984
• Est. Priority Date: 03/10/1982
• Status: Expired due to Term

• Current Assignee: M&R Marking Systems Incorporated (Trodat Trotec Holding GmbH)
• Original Assignee: M & R Seal Press Co., Inc.
• Inventors: Wall, Alexander C., Sculler, Leonard H.
• Primary Examiner(s): Pieprz, William
• Application Number:
  US06/356,842
• Time in Patent Office: 713 Days
• Field of Search: 101/327, 101/102, 101/333, 101/334, 101/104, 101/108, 101/125, 400/199-202.2
• US Class Current: 101/334
• CPC Class Codes: B41K 1/40 Inking devices operated by stamping movement

Abstract

An improved self-inking hand stamping device comprises improved arrangements of parts of an encasing operating member relative to a frame member containing an invertible stamp carrying platen, and of an ink pad holder relative to the frame member and other parts inside the operating member; and a new construction of the ink pad holder enables clean and controlled inking of the ink pad in a holder kept in working position.

Claims

1. In a stamping device comprising an upright hollow frame member having an open lower end to bear against a supporting surface, an operating member interfitting with and displaceable vertically relative to said frame member, spring means normally holding said operating member in an upward position from which by one'"'"'s hand it can be pressed downward relative to said frame member to a stamping position, an ink pad holder supported by said frame member at a distance above said lower end, a displaceable stamp-carrying platen inside said frame member, and coacting means connected respectively with said platen, said frame member and said operating member for disposing said platen in an inking position at said holder when said operating member is depressed to stamping position;

the improvement wherein said operating member comprises an upright wall forming a hollow encasement that surrounds and has a height greater than that of said frame member, has a closure fitted removably onto its upper end, and encompasses substantially the entirety of said frame member when depressed to stamping position, whereby the stamping device can be easily grasped, placed for use and operated by a person'"'"'s hand engaged with opposite sides of the device from any direction and at any location about the operating member, said encasement wall sloping outward substantially from its bottom to a rim on its upper end, said closure having a skirt portion engaging about said rim and merging with the top of said wall, and spring seating means bridging and fixed to said rim, said spring means being compressed between said ink pad holder and said seating means and thus continuing to be active upon removal of said closure.

2. A stamping device according to claim 1, said closure having a top panel presenting an upwardly facing top surface for displaying the stamp indicia of the device, which surface is sloped at an acute angle to the horizontal from one side to the opposite side of said skirt portion so that it defines the front of the device, said top surface comprising a substantially flat surface area corresponding in width and length at least to the dimensions of said platen, the longitudinal borders of said surface area being substantial aligned vertically with those of the open area of said open end, thereby aiding a user to position the device for desired location of an imprint of said indicia.

3. A stamping device according to claim 1 or 2, said encasement wall being a plastic molding of substantially uniform thickness having along its inner side inward protrusions which widen in upward direction so as to limit said operating member to a rectilinear path relative to said frame member.

4. In a stamping device comprising an upright hollow frame member having an open lower end to bear against a supporting surface, an operating member interfitting with and displaceable vertically relative to said frame member, spring means normally holding said operating memeber in an upward position from which by one'"'"'s hand it can be pressed downward relative to said frame member to a stamping position, an ink pad holder supported by said frame member at a distance above said lower end, a displaceable stamp-carrying platen inside said frame member, and coacting means connected respectively with said platen, said frame member and said operating member for disposing said platen in an inking position at said holder when said operating member is in said upward position and disposing said platen in position to impress a surface at said lower end when said operating member is depressed to stamping position,

the improvement wherein said operating member comprises an upright wall forming a hollow encasement that surrounds and has a height greater than that of said frame member, a top closure having a skirt portion fitted removably onto and about the upper end of said encasement and a bridge member fixed to and across said upper end, said spring means comprising at least one spring compressed between said ink pad holder and said bridge member,

said ink pad holder comprising a rigid backing to hold thereunder a downwardly faced ink absorbent pad and pad inking means on said backing for receiving ink and passing it to said pad with said holder kept in normal working position relative to said frame member, said encasement and said spring means;

said inking means including at least one upwardly open cup fomation protruding upwardly from said backing to receive drops of ink and capable of holding only a few drops at a time,

and at least one opening inside said upper encasement end at the level of said bridge member and through which upon removal of said closure each said cup formation is accessible from above said encasement for dropping ink into the cup formation.

5. A stamping device according to claim 4, said backing having at least one downwardly open pocket forming portion that protrudes upwardly therefrom and holds over and in contact with said pad a mass of ink receptive material to receive ink and distribute it into said pad, said mass being small in volume relative to the size of said pad, each said pocket forming portion having a small opening thereinto through the top thereof for conducting ink into said mass therein and having a said cup formation protruding upwardly from its top about its said opening.

6. A stamping device according to claim 4, said bridge member being open in an area thereof over and vertically aligned with each said cup formation so that the cup formation is accessible via the aligned open area for delivery of ink thereinto.

7. A stamping device according to claim 6, each said cup formation being located centrally of and inside a coiled spring comprised by said spring means.

8. A stamping device according to claim 6 or 7, each said cup formation protruding into a said open area of said bridge member when said encasement is depressed relative to said frame member to a stamping position.

9. In a stamping device comprising an upright hollow frame member having an open lower end to bear against a supporting surface, an operating member interfitting with and displaceable vertically relative to said frame member, spring means normally holding said operating member in an upward position from which by one'"'"'s hand it can be pressed downward relative to said frame member to a stamping position, an ink pad holder supported by said frame member at a distance above said lower end, a displaceable stampcarrying platen inside said frame member, and coacting means connected respectively with said platen, said frame member and said operating member for disposing said platen in an inking position at said holder when said operating member is in said upward position and disposing said platen in position to impress a surface at said lower end when said operating member is depressed to stamping position,

the improvement wherein said operating member comprises an upright wall forming a hollow encasement surrounding said frame member and having an openable closure at its top and a bridge member fixed across the upper end of said encasement, said spring means comprising at least one spring compressed between said ink pad holder and said bridge member, said holder being accessible from the top of said encasement upon opening of said closure, said ink pad holder being seated removably into an upper portion of said frame member, said bridge member being fixed detachably to said encasement, each said spring being a coiled spring having opposite ends thereof interengaged with parts respectively of said bridge member and said holder so that the bridge member, spring means and ink pad holder may be removed as a unit from the stamping device upon detachment of the bridge member from said encasement.

10. An ink pad holder for a stamping device, comprising a rigid backing to hold thereunder a downwardly faced ink absorbent pad, said backing having at least one downwardly open pocket forming portion that protrudes upwardly therefrom and is filled with, and holds in contact with said pad, a mass of ink receptive material to receive ink and distribute it into said pad, said mass being substantially wider over its area of contact with said pad than it is thick yet being small in volume relative to the size of said pad, each said pocket forming portion having a small opening thereinto through the top thereof for conducting ink gradually into said mass therein and having an uncovered, upwardly open cup formation protruding upwardly from its top about its said opening to receive a limited quantity of ink for dissemination through its said opening into its said mass and thence into said pad, each said cup formation being of a size capable of holding a few but only a few drops of ink at a time.

11. An ink pad holder according to claim 10, said backing being of elongate rectangular form and having thereon a plurality of said pocket forming portions spaced apart therealong, each said ink conducting opening being of about 2 to 3 mm in diameter.

12. In a stamping device comprising an upright hollow frame member having an open lower end to bear against a supporting surface, an operating member interfitting with and displaceable vertically relative to said frame member, spring means normally holding said operating member in an upward position from which by one'"'"'s hand it can be pressed downward relative to said frame member to a stamping position, an ink pad holder supported by said frame member at a distance above said lower end, a displaceable stamp-carrying platen inside said frame member, and coacting means connecting respectively with said platen, said frame member and said operating member for disposing said platen in an inking position at said holder when said operating member is in said upward position and disposing said platen in position to impress a surface at said lower end when said operating member is depressed to stamping position, the improvements wherein:

said operating member comprises an upright wall forming a hollow box-like encasement that surrounds and has a height greater than that of said frame member and has a removable closure fitted onto its upper end;

said frame member being a substantially straight rectangular box open at its top and bottom and having ledges protruding inwardly from opposite side walls thereof at a location near its top, said ink pad holder being seated inside said box on said ledges;

said encasement having a bridge member fixed detachably to and across its upper end, said spring means comprising a pair of coiled springs compressed between said ink pad holder and said bridge member;

each of said springs having opposite ends thereof inter-engaged with parts respectively of said bridge member and said holder so that the bridge member, spring means and ink pad holder may be removed as a unit from the stamping device upon detachment of the bridge member from said encasement;

said holder comprising a rigid backing to hold thereunder a downwardly faced ink absorbent pad and a pair of downwardly open pockets protruding upwardly from said backing to receive ink and distribute it into the pad, each of said pockets having an opening thereinto through the top thereof for conducting ink into the pocket;

each said pocket also having an upwardly open cup formation thereon about each said opening to receive a limited quantity of ink for dissemination into the pad;

14. A stamping device according to claim 12, said encasement wall sloping outward from its bottom to a rim on its upper end, said closure having a skirt portion engaging about said rim and merging with said wall, and having a top panel presenting an upwardly facing top surface for displaying the stamp indicia of the device, which surface comprises a substantially flat area that corresponds in width and length at least to the dimensions of said platen and has its longitudinal borders substantially aligned vertically with those of the open area of said open end, said surface being sloped at an acute angle to the horizontal from one side to the opposite side of said skirt portion so that it defines the front of the device.

13. each cup formation being capable of holding only a few drops of ink at a time and being located centrally of and inside one of said coiled springs, said bridge member being open in an area thereof over said cup formation, each said cup formation protruding into an open area of said bridge member when said encasement is depressed relative to said frame member to stamping position.