Strip stock lifter

A stock lifter device for use in pairs and at opposite edge portions of strip stock for separating and supporting the strip stock out of engagement with the working face of a die member during performance of die operations upon said stock;

• said stock lifter device including:
• an upright post stationarily mounted so that the upper end portion of the post is projectible into the lower end section of a bore in the die member that extends through the die member and opens out on the working face side thereof;
• a stock lifter body adapted to slidably fit the bore in the die member for endwise movement therein perpendicular to the working face of the die member, the upper end of the body having a side opening recess for receiving and supporting a marginal edge portion of the strip stock;
• a helically coiled spring encircling the post and acting on the lower end portion of the stock lifter body to yieldingly project the upper end of the body outwardly of the working face of the die member;
• and
• a pin and slot connection coupling the stock lifter body to the post and enabling the body to move under the influence of said coilded spring or in response to opposing die operating forces overcoming that of the spring, said pin and slot connection being so shaped as to restrain the stock lifter body against rotation about its axis while guided in its reciprocal motion within the die member;
• said slot having an opened end and a stop element sitting astride the open end to limit the extent of travel of the stock lifter body, and said stop element being removable from said astride condition when the stock lifter body has assumed a given position in its path of travel provided by the slot of the pin and slot connection.

A stock lifter device for use with progressive die operations and more particularly for separating and supporting the strip stock out of engagement with the working face of a progressive die member during performance of die operations upon said stock;

• said stock lifter device including, in combination:
• a die member having a vertical bore therethrough which opens out on the working face of the die member;
• an upright post stationarily mounted so that the upper end portion of the post projects into the lower end section of the bore in the die member;
• a stock lifter body slidably fitting the bore in the die member for endwise movement therein perpendicularly to the working face of the die member;
• a helically coiled spring encircling the post and acting on the lower end portion of the stock lifter body to yieldingly project the upper end of the body outwardly of the working face of the die member and thus separate and support the strip stock out of engagement with the working face of the die member;
• and
• a sliding connection within the bore and between the upper end of the stationary post and the movable stock lifter body limiting the travel of the body to a prescribed distance and at the same time restraining the body from rotation about its axis.

A stock lifter device for use with progressive die operations and more particularly for separating and supporting the strip stock out of engagement with the working face of a progressive die member during performace of die operations upon said stock;

• said stock lifter device including, in combination:
• a die member having a vertical bore therethrough which opens out on the working face of the die member;
• an upright post stationarily mounted so that the upper end portion of the post projects into the lower end section of the bore in the die member;
• a stock lifter body slidably fitting the bore in the die member for endwise movement therein perpendicularly to the working face of the die member;
• a helically coiled spring encircling the post and acting on the lower end portion of the stock lifter body to yieldingly project the upper end of the body outwardly of the working of the die member and thus separate and support the strip stock out of engagement with the working face of the die member;
• and
• a sliding connection between the upper end of the stationary post and the movable stock lifter body limiting the travel of the body to a prescribed distance and at the same time restraining the body from rotation about its axis;
• said sliding connection comprising a slot in the upper end portion of the post and a pin carried by the stock lifter body and slidably fitting the slot in the post, and a key element yieldingly expandibly engageable with the confronting walls of the slot to form a stop against which the pin abuts at one end of its travel.

A stock lifter device for use in pairs and at opposite edge portions of strip stock for separating and supporting the strip stock out of engagement with the working face of a die assembly during performance of die operations upon said stock, the said die assembly being composed of a die steel member superimposing a die shoe member with each having a vertically aligned bore of the same cross section;

• said stock lifter device including an upright post stationarily anchored at its base in the vertical bore in the die shoe member and rising to a height to enter the lower portion of the aligned bore in the die steel member;
• a stock lifter body slidably fitting the bore in the die steel member for endwise movement therein;
• a helically coiled spring coaxial with the upright post and so mounted as to act on the lower end of the stock lifter body to yieldingly project the upper end of the body outwardly of the working face of the die assembly;
• and
• means providing a slidable fit within the aligned bores and between the upper end of the upright post and the stock lifter body so as to guide the body in a straight line, non-rotative motion as it is influenced by the force of the spring or by opposing die operating forces overcoming that of the spring.

A stock lifter device for use in separating and supporting strip stock out of engagement with the working face of a die member during performace of die operations upon said stock;

• said stock lifter device including:
• an upright post stationarily mounted so that the upper end portion of the post is projectible into the lower end section of a bore in the die member that extends through the die member and opens out on the working face side thereof;
• a stock lifter body adapted to slidably fit the bore in the die member for endwise reciprocating movement therein perpendicular to the working face of the die member, the upper end of the body having a side opening recess for receiving and supporting a marginal edge portion of the strip stock;
• a helically coiled spring encircling the post and acting on the lower end portion of the stock lifter body for yieldingly projecting the upper end of the body outwardly of the working face of the die member;
• a pin and slot connection coupling the stock lifter body to the post and enabling the body to move under the influence of said coiled spring or in response to opposing die operating forces overcoming that of the spring, the slot being formed in the upper portion of the upright post and opening out through the upper end thereof, and the pin being carried by the stock lifter body crosswise of the slot thereby to restrain the stock lifter body against rotation about its axis as it is guided in its reciprocal motion within the die member;
• and
• a key element yieldingly expandibly engageable with the confronting walls of the slot to form a stop against which the pin abuts at the upper end of its travel.

A stock lifter device for use with progressive die operations and more particularly for separating and supporting the strip stock out of engagement with the working face of a progressive die member during performance of die operations upon said stock;

• said stock lifter device including, in combination:
• a die member having a vertical circular bore therethrough which opens out on the working face of the die member;
• an upright post of cylindrical shape stationarily mounted so that the upper end portion of the post projects into the lower end section of the bore in the die member;
• a stock lifter body of cylindrical shape slidably fitting the bore in the die member for endwise movement therein perpendicularly to the working face of the die member;
• spring means yieldingly acting on the stock lifter body to project the upper end of the body outwardly of the working face of the die member and thus separate and support the strip stock out of engagement with the working face of the die member;
• a sliding connection between the upper end of the stationary post and the movable stock lifter body limiting the travel of the body to a prescribed distance and at the same time restraining the body from rotation about its axis, said sliding connection including an upwardly opening slot in the upper end of the stationary post and a member slidable therein which is attached to the stock lifter body and restrains the same from rotation about its axis as it moves endwise in the bore of the die member;
• and
• a key element yieldingly expandibly engageable with the confronting walls of the form a stop at the upper end of the slot barring egress of the slidable member therefrom.

A stock lifter device for use in separating and supporting the strip stock out of engagement with the working face of a die assembly during performance of die operations upon said stock, the said die assembly being composed of a die steel member superposing a die shoe member with each having a circular vertically aligned bore of the same diameter;

• said stock lifter device including an upright post stationarily anchored at its base in the vertical bore in the die shoe member and rising to a height to enter the lower portion of the aligned bore in the die steel member;
• a stock lifter body slidably fitting the bore in the die steel member for endwise movement therein;
• a helically coiled spring coaxial with the upright post and mounted wholly within the area circumscribed by the aligned bores so as to act on the lower end of the stock lifter body to yieldingly project the upper end of the body outwardly of the working face of the die assembly thus separate and support the strip stock out of engagement with the working face of the die member;
• means wholly within the area circumscribed by the aligned bores providing a slidable fit between the upper end of the upright post and the stock lifter body so as to guide the body in a straight line, non-rotative motion as it is influenced by the force of the spring or by opposing die operating forces overcoming that of the spring.