Mishnah Kelim 3:3-4

Sugya Map: The Ontological Status of a "Mended" Vessel

• Core Issue: Does a keli cheres (earthenware vessel) retain its legal "name" (shem keli) after being compromised and subsequently mended?
• Nafka Mina: Whether a mended vessel is susceptible to tum’ah (impurity) or remains tahor because the "vessel-ness" was once nullified.
• Primary Sources: Mishnah Kelim 3:3-4; Tosefta Kelim 2:2; Rambam, Hilchot Kelim 11:4-6.

Text Snapshot

• Mishnah 3:4: "חבית שניקבה וסותמה בזפת וחזרה ונשברה... אם יש באותו שבר המחזיק רביעית טמאה... וחרס שניקב וסותמה בזפת טהור" (A jar that had a hole and was mended with pitch and then broken again... if the fragment holds a revi'it, it is unclean... but a potsherd [not a whole jar] that had a hole and was mended is clean).
• Nuance: The shift from tamei (feminine, referencing the chavit) to tamei (masculine, referencing the cheres) is a deliberate linguistic signal—the cheres is a remnant, not the original entity.

Readings

• Rambam: The chiddush is one of continuity. A jar, even when punctured, retains its shem keli as long as it is essentially "the jar." Mending it with pitch re-activates its status because the entity never ceased to be a vessel.
• Rash MiShantz: Emphasizes that a potsherd is a distinct legal category. Once a piece breaks off, it loses its "vessel" identity. Mending that shard doesn't "restore" it because the original shem keli was extinguished the moment it became a mere shard (batel shem keli).

Friction

• Kushya: If the chavit (jar) is mended with pitch, why does it become tamei? Pitch is not a structural repair; it is a temporary sealant.
• Terutz: As Yachin (3:17) clarifies, the status depends on the vessel's use. If the pitch restores its capacity to hold, it is a keli. The chavit retains its identity because the structure (the walls) remains, whereas a cheres has no structural integrity to begin with.

Intertext

• Shabbat 96a (Rashi s.v. Tahor mikulom): Parallel logic regarding the definition of a vessel's capacity.
• SA YD 201: The distinction between a keli that is broken and one that is merely "pierced" (the nikvah vs. nishberah distinction).

Psak/Practice

The heuristic is: Structure vs. Substance. In modern applications (meta-halacha), a vessel that is "mended" (e.g., glue, epoxy) only regains keli status if the repair restores the original function for which the vessel was designed. If the item was functionally "dead" (a shard), it cannot be resurrected by a patch.

Takeaway

Impurity tracks the integrity of the definition, not just the physical utility; once the legal entity is severed, minor repairs cannot stitch it back into the world of tum’ah.