DE165749C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The invention relates to machines for mechanical impregnation and greasing or otherwise treating the grain side of tanned hides with a liquid 5 or paste in finishing the hides into marketable leather.

When applying an impregnation or other liquid or paste to the It is the grain side of a tanned skin

ίο essential that the liquid or paste is rubbed into the skin in such a way that it coincides with the fibrous surface forming the scar side Substance of the skin, so to speak, forms a homogeneous product. This result can can only be achieved in a satisfactory manner that the grain side of the Skin with the liquid or paste under pressure and in the direction of the scar and rub against the scar. This will thoroughly immerse the liquid or paste incorporated the fibrous structure of the skin. The more even the pressure and the friction is on the skin, the more absorbent and uniform the finished product will be be.

_ So far, the treatments mentioned above in general have mainly been used by Hand executed and it took considerable skill and care to make the Formation of wrinkles in the skin during rubbing and application of liquid or paste to prevent. For this purpose the worker had to remove the liquid with one hand or apply paste with frictional pressure and hold the part of the skin to be treated with the other hand. These Treatment was slow and inadequate because of the evenness of the Pressure and rubbing over the entire surface of the skin was impossible, and it turned out that that the individual hides, which were made by different workers or also by the same Workers had been treated were quite unequal among themselves.

There are known machines for treating leather with liquids or pastes, in which the skins attached to migrating carriers are passed through pairs of friction pads are, the upper members of which are rotatably arranged so that they the Pressing skins against the lower limbs and thus the applied liquid or Work the paste into the skins.

This involves a circular, rubbing movement, like the one carried out by hand is not achieved and the liquid or paste is applied in strokes.

According to the present invention, the hides are now to be treated by means of a machine that mimics the handicraft exactly, but avoids the shortcomings of the handicraft and provides a more consistent product of better quality.

For this purpose, the known friction pads are rotated when they come into contact with the surface that moves in a straight line

Claims (3)

away from the skins, with wrinkling during rotation of the friction pads is prevented by annular fixed cushions which are arranged so that they all around the friction pads against the. Press surface of the skins. The drawing represents the subject matter of the invention, namely shows
Fig. Ι the front view, ίο Fig. 2 on an enlarged scale Side view, 3 shows an individual part in side view and FIG. 4 shows the same in longitudinal section. In a frame A , chain wheels A ^{1 are} mounted in a known manner, which drive the endless chains A ² on which the tables A ³ carrying the skins are seated. Instead of the tables ^ ³ , other machine parts can also be used, which carry the skins and guide them through the machine. The tables A ^a illustrated for example in the drawing are rotatably mounted in the links of the chain A ¹ that they are always held in an upright position. The tanned hides to be treated are hung over the upper edges α of the tables when the latter have passed the lower chain wheel, and are thus conveyed upwards and fed to the working parts. The device for treating the hides consists of the following parts: In a suitable bracket B attached to the machine frame, on both sides of the plane of movement of the tables A ³ rollers B ^s B ^{3 are} attached, which are pressed against each other by springs (Fig. 1 and 2 ). Above each roller there is a perforated feed pipe b ¹ , which receives the treatment liquid or paste from containers B ⁶ B ⁶ and feeds it to the rollers jB ³ B ³ , the surface of which is covered with any material that absorbs liquid or paste, such as felt or the like ., is dressed. The devices for triturating the liquid or paste are arranged above the rollers B ³ B ^3. Each of these consists of a cylindrical housing JD ¹ (FIGS. 3 and 4) to which the actual friction pads are attached to the support plates C ³ by means of a holder d . A sleeve D ² is rotatably mounted in the housing D ¹ , on which a chain wheel D ^{4 is} attached, by means of which the sleeve can be set in rotation. The support plates C ³ C ³ are rotatably connected to subframes C ¹ C ² (Fig. 1 and 2), one of which is arranged in front of, the other behind the plane of movement of the tables ^ L ³ . The plates C ³ can therefore, if desired, be rotated outwards away from the tables ^ l ^3. However, in order to be able to hold the plates during the work of the friction pads, holding devices such as grippers or bolts c ¹ c ² (Fig. 1) are arranged. Inside the sleeve Z) ² a piston E carrying a friction pad is freely movable in the longitudinal direction and is connected to the sleeve by a tongue and groove so that it can move back and forth in the sleeve as well as rotate with it . To move the piston in the sleeve in the direction of the arrow (Fig. 4), a spring E ^{1 is used} , which sits between the piston and the cover of the sleeve D ^2. The 'movement of the piston in the direction of the arrow (Fig. 4) is limited by nuts ^{on rod e 2.} The piston E carries at its outer end on a reinforcement by means of a wire e ⁶ a piece of suitable friction material e ⁵ , z. B. a piece of carpet or the like. The friction pads D are expediently arranged offset from one another in two rows on the support plates C ³ , so that all parts of the surface of the scar side of the skin can be treated in a certain way. Two rows of these devices are illustrated in the drawings, but a third row can be added if desired. The friction pads e ^{5 of} the pistons E are pressed against the surface of the skins according to the pressure exerted by the springs E ^1; they also rotate so that the liquid or paste is well worked into the skin according to the handiwork. Since it is of great importance that no wrinkles form in the skin during the treatment, that part of the skin, as in known machines, is held firmly against the table on which the rotating friction pads act. For this purpose, a ring F surrounds the friction pad e ⁵ , which carries a pad / in a groove and is held in a guide F ¹ on the support plate C ³ . Pins / ¹ are provided to prevent the ring F from being twisted by the skin in contact therewith. Patent-A ν Proverbs: i. Machine for mechanical impregnation, greasing or other treatment the surface of skins with a liquid or paste in which the skins attached to moving carriers by a number of resiliently mounted skins Friction pads are processed so that characterized in that the friction pads (e ^ J are set in rotation while they are in contact with the skins moving in a straight line, for the purpose of achieving a friction effect similar to the treatment by hand. 2. An embodiment of the machine according to claim ι, characterized in that the friction pads (e ^h ) sit on the heads (E ² ) of pistons (E) , which move freely in the longitudinal direction in rotatable sleeves (D " ² ) and can rotate with these and are pressed outwards against the skin by springs (E ¹ ). 3. An embodiment of the machine according to claim 1, characterized in that the friction pad (e ⁵ ) is surrounded by an annular, fixed pad (f) which lies against the surface of the skin and thus prevents wrinkling. ^r 1 sheet of drawings.