US2033705A

US2033705A - Printing plate base

Info

Publication number: US2033705A
Application number: US759571A
Authority: US
Inventors: Horace W Hacker
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-12-28
Filing date: 1934-12-28
Publication date: 1936-03-10
Anticipated expiration: 1953-03-10

Description

H. w. HACKER PRINTING PLATE BASE Filed Dec. 28, 1954 Sheets-Sheet l H. w. HACKER PRINTING PLATE BASE Filed Dec. 28, 1954 2 Sheets-Sheet 2 Patented Mar. 10, 1936 UNITED STATES PATENT OFFICE PRINTING PLATE BASE.

Horace W. Hacker, La Grange, 111.

Application December 28, 1934, Serial No. 759,571

I 9 Claims. (01. 101-382) My invention relates tolumber from which printing plate bases are to be cut to desired sizes and has for its purpose to so construct such lumber that bases cut therefrom will retain their original form and size under conditions incident to their use.

In the drawings chosen to illustrate my invention the scope whereof is set forth in the appended claims:

Figure 1 is a fragmentary perspective view of a printing plate base cut from lumber constructed in accordance with my invention; and

Figures 2, 3 and 4 are similar views of alternative forms of my invention.

Referring to; Figure 1 my improved lumber is shown as having its top and bottom formed of sheets of nail penetrable and planeable material, in this instance sheets of cast metal III and II. In casting these sheets I provide their inner faces with cross tongues I2, although any other suitable type of formations may be provided on the inner faces of the sheets. Between these sheets I provide a plurality of wood blocks I3 having their cross grain ends disposed in parallel planes with the ends common to one of the planes covered by the sheet II] and the ends common to the other plane covered by the sheet II. The cross grain ends of each of the blocks I3 are provided with cross grooves I4 which receive the cross tongues I2 of the sheets II) and II. The position of the cross tongues I2 and cross grooves I I is such that, when the lumber is assembled as shown in Figure 1, they serve to both interconnect the blocks I3 and also position them with their opposed faces spaced apart to avoid the possibility of any undesirable cumulative effect on the stability of the lumber due to side swelling of the blocks. In assembling the lumber the sheets l and II and the cross grain ends of the blocks I3 are of course cemented together.

In the form of my invention shown in Figure 2 the inner faces of the sheets I0 and II are provided with cross knurling which produces somewhat pointed formations I5. In assembling this structure the parts are positioned in proper relation with cement applied between the blocks and sheets and then pressed together to force the formations I5 into the cross grain ends of the blocks I3 as clearly shown in the drawings.

The structures shown in Figures 1 and 2 are characterized by the rigidity and strength essential to properly sustain the pressure incident to locking up a printing form in which either is embodied and also render possible the practical use of wood with upright grain by preventing splitting of the wood blocks when nailed near an edge or corner due to the holding influence of the sheet III or sheet II, according to which sheet is penetrated in nailing. The structure shown in Figure 2' is also characterized by economy in production. ,7

In the form of my invention shown inFigure 3 the construction and arrangement and relation of the blocks I3 is the same as that described in connection with Figures 1 and 2, but the sheets l0 and II are dispensed with and open grids I6 and II are engaged and cemented in the grooves I4.

The form of my invention shown in Figure 4 is similar in all respects to that shown in Figure 3, but embodies in addition sheets of nail penetrable and planeable material I8 and I9 cemented to opposite cross grain ends of the blocks l3 respectively and to related open grids I6 and II. In this instance the sheets I8 and I9 are shown as constituted of wood veneer, but said sheets may be made from any other suitable material. In this form of my invention planing for heighth can be accomplished with greater facility than in the form shown in Figure 3.

In all the forms illustrated and described distinct advantage is gained with respect to stability of heighth of the base as wood changes its dimensions very slightly in the direction of the grain, while the spacing apart of opposed faces of the blocks serves to eliminate any cumulative effect on stability of form due to side swelling of the blocks.

While I have shown the blocks I3 in all the forms arranged with their grain upright it will be understood that other arrangements of the blocks can be resorted to without departing from the spirit of my invention or the scope of the 40 appended claims.

I claim:

I. Lumber from which printing plate bases are to be cut comprising sheets of nail penetrable and planeable material constituting the top and bottom of the lumber, a plurality of wood blocks between the sheets said blocks having their opposed faces in spaced relation, and formations on at least one of the sheets engaged in the blocks.

2. Lumber from which printing plate bases are to be cut comprising a plurality of wood blocks positioned with opposite ends disposed in parallel planes respectively and with spaces between their adjacent opposed faces, and separate block interconnecting means, one of which is engaged in the ends of the blocks common to one plane and the other of which is engaged in the ends of the blocks common to the other plane, both of said means being located entirely outside the spaces between adjacent opposed faces of the blocks.

3. Lumber from which printing plate bases are to be out comprising a plurality of wood blocks positioned with opposite ends disposed in parallel planes respectively and with spaces between their adjacent opposed faces, and block interconnecting means engaged in the ends of the blocks common to one of said planes, said means being located entirely outside the spaces between adjacent opposed faces of the blocks.

4. Lumber from which printing plate bases are to be cut comprising sheets of nailpenetrable and planeable material constituting the top and bottom of the lumber, a plurality of wood blocks between the sheets relatively positioned to provide spaces between their adjacent opposed faces, and formations on at least one of the sheets engaged in the blocks and disposed entirely outside said spaces.

5. Lumber from which printing plate bases are to be cut comprising sheets of nail penetrable and planeable material constituting the top and bottom of the lumber, a plurality of wood blocks between the sheets relatively positioned to provide spaces between their adjacent opposed faces and each of said blocks having its cross grain ends abutting the sheets respectively, and formations on at least one of the sheets engaged in the blocks and disposed entirely outside said spaces.

6. Lumber from which printing plate bases are to be cut comprising a plurality of wood blocks positioned with opposite ends disposed in parallel planes respectively and with spaces between their adjacent opposed faces, and open grids, one of which is engaged in recesses in the ends of the blocks common to one of the planes and the other of said grids being engaged in recesses in the ends of the blocks common to the other plane, both of said grids being located entirely outside the spaces between adjacent opposed faces of the blocks.

7. Lumber from which printing plate bases are to be cut comprising a plurality of wood blocks positioned with opposite ends disposed in parallel planes respectively and with spaces between their adjacent opposed faces, an open grid engaged in recesses in the ends of the blocks common to one of the planes with said grid disposed entirely outside the spaces between adjacent opposed faces of the blocks, and sheets of nail penetrable and planeable material, one of which is secured to and covers the ends of the blocks common to one plane and the other of which is secured to and covers the ends of the blocks common to the other plane.

8. Lumber from which printing plate bases are to be cut comprising a plurality of wood blocks positioned with opposite ends disposed in parallel planes respectively and with spaces between their adjacent opposed faces, open grids respectively engaged in recesses in the ends of the blocks common to said planes with said grids disposed entirely outside the spaces between adjacent opposed faces of the blocks, and sheets of nail penetrable and planeable material, one of which is secured to the ends of theblocks common to one plane and the other of which is secured to and covers the ends of the blocks common to the other plane.

9. Lumber from which printing plates are to be cut comprising a plurality of wood blocks positioned with opposite ends disposed in paral-' lel planes respectively and with each pair of their adjacent faces having an uninterrupted free space therebetween throughout their entire areas, and sheets of nail penetrable material, one

of which is secured to and covers the ends of the blocks common to one plane and the other of which is secured to and covers the ends of the blocks common to the other plane.

HORACE W. HACKER.